Neometrix / Fire Water Systems / Fire Hydrant & Pump System / NMX-FHP-62

NMX-FHP-62 · ENGINEERED-TO-ORDER CLASS — SPECIFY · SIZE · INSTALL · COMMISSION · TEST · PROVE

Fire Hydrant & Pump System. Judge it at the farthest hydrant.

Name: Fire Hydrant and Pump System
Brand: Neometrix
SKU: NMX-FHP-62

A hydrant system is a pump, a main and a row of hydrants. It is only as good as the pressure and flow at the last one. A pump that passes its own test has shown only where the water starts.

So the system is built around three things: a main sized from the farthest hydrant, a pump set that starts in order, and a test at the last hydrant, not only at the pump.

Discuss a hydrant system Capability note (PDF)

A single fire pump set on a plain white studio background: a horizontal centrifugal pump with a smooth red painted casing coupled through a guarded shaft coupling to a grey painted electric motor, both bolted to one welded grey steel base frame, with a short vertical riser pipe and a butterfly valve with a lever handle rising from the pump discharge and a suction pipe with a flanged elbow entering the other end of the casing, and no people

Fig · 01 — A fire pump set: a horizontal centrifugal pump with a red painted casing, coupled to an electric motor on one steel base, with a valve on its discharge riser — illustrative render.

The test

at the farthest hydrantnot only at the pump

The pumps

jockey, main, standbyeach started in order

The main

sized for the longest runfriction counted

The water

a supply that cannot starvethe suction is part of the design

Status

engineered to orderno fire water system claimed

ISO 9001ISO 14001NFPA 20 and IS 13039 reference standards

Overview

Why the whole job is the last hydrant.

Because the pump is bought at its own outlet, and the hydrants are at the far end of a main. The pressure that matters is the one that is left when the water gets there.

Fig · 02 — The system in one picture: water is held ready with a pump set behind it, a main carries it the longest run, and pressure and flow are delivered at the last hydrant.

Judge it at the farthest hydrant.

What the system is for

It holds water ready under pressure and delivers it to hydrants across a plant, a campus or a test facility, so that hoses can be connected and used at once. It is a pump set, a main and hydrants, built to deliver a stated pressure and flow at the hydrant that is hardest to reach.

Why the pump is not the system

A pump is tested at its own outlet. The hydrants are at the end of a main, and friction in the main takes its share of the pressure on the way. A pump that passes its own test shows nothing about what the farthest hydrant gets.

Why it is judged at the farthest hydrant

Pressure falls along the main with distance, and falls faster at a higher flow. The farthest hydrant therefore has the least pressure and fails first, so the main is sized from it and the system is proven there.

Why the pump and the pipe decide the flow

A pump's head falls as its flow rises. A pipe's demand for head rises faster than the flow. The pump works where the two curves cross, and a longer, rougher or older main moves that point to a lower flow.

Why there are three pumps

A jockey pump makes up small losses. The main pump starts when a hydrant opens and the pressure keeps falling. The standby starts if the main does not hold it. Each starts at its own falling pressure, and a main set to start low lets the pressure fall far before help arrives.

Why a pump is not run shut for long

With no flow, all the shaft power heats the water in the casing. A run against a closed valve is therefore short, and a pump carries a small circulation relief that passes a trickle.

Why the water supply is part of the system

A pump can only deliver what its suction can feed. The reservoir, the suction pipe and the water level belong to the design, because a pump that starves cannot deliver the curve it was bought for.

The method

Specify, size, install, commission, test, and prove.

Six steps in a fixed order. The two shaded steps are the ones a quick order skips.

FIG · 02FIRE HYDRANT & PUMP SYSTEM · SPECIFY / SIZE / INSTALL / COMMISSION / TEST / PROVE — JUDGE IT AT THE FARTHEST HYDRANT

The step people underrate is the test at the last hydrant. A pump that passes its own test has not been shown to serve the farthest hydrant.

Fig · 03 — Three ways a hydrant system lets you down: it is tested at the pump, its start is set too low, and a pump is run shut — a drawing of the idea, with no values.

1 · Specify

The demand, the layout of the site and the water supply are stated by the customer, and the system is sized to them.

2 · Size

The main and the pumps are sized from the farthest hydrant, with friction counted along the whole run.

3 · Install

Mains, valves, hydrants and the pump set are fitted so that a section can be isolated without shutting the rest.

4 · Commission

Each pump is run at churn, which means no flow, at its rated flow and at an overload flow, and its start order is checked.

5 · Test

Pressure is read at the farthest hydrant with the design flow running, and again as a hydrant is opened and the pumps start in turn.

6 · Prove

The readings are kept, and handed over with the system.

Work content

What the system contains, element by element.

Read it as a checklist: a system missing a row will pass a test at the pump and fail at the hydrant.

A single red painted pillar-type fire hydrant standing upright on a short flat concrete plinth on a plain white studio background, with a round hand wheel on top, two round outlet valves on its sides closed with steel blanking caps on short chains, and a short flanged steel pipe stub joined to the base of the pillar, and no people

Fig · 04 — A pillar hydrant: two outlet valves closed with steel caps on chains, a hand wheel on top, and a flanged connection to the main — illustrative render.

Element	What it does	What matters
Water supply	holds the water	a reservoir or sump with a level the pumps can draw on for as long as the system is meant to run
Suction	feeds the pumps	a suction that cannot starve a pump, with no air pockets and a clear screen
Jockey pump	makes up small losses	a small pump started at the highest of the falling pressures, so that a leak does not start the main pump
Main pump	serves the demand	sized for the design flow at the pressure the farthest hydrant needs, and started when the pressure keeps falling
Standby pump	covers a failure	a second pump, on a different drive where the site calls for it, started if the main does not hold the pressure
Pump controllers	start the pumps in order	a controller for each pump that starts it at its own pressure and records the start
Circulation relief	keeps a pump cool	a small relief that passes a trickle when the pump runs with no flow
Main and ring	carry the water	pipe sized from the farthest hydrant, laid as a ring where it can be, with isolating valves
Hydrants and valves	hand the water over	hydrants with outlet valves and caps, placed along the main where a hose can reach them
Test line	lets a pump run at flow	a line that returns water to the supply, so that a pump can be run at its rated and overload flows
Pressure logging	shows what the system does	readings at the pump house and at the farthest hydrant, logged against time
Procedure	fixes the sequence	specify, size, install, commission, test and prove, the same for every site
Testing & documentation	prove the system first	a pump run at the three flows, a pressure reading at the farthest hydrant, and a record the customer can inspect

The element that decides whether the system does its job is the reading at the farthest hydrant, because a system tested only at the pump can pass and still fail where the hose is connected.

Fig · 05 — Where the pressure goes: the pump's pressure is spent on friction in the main and on height, and what is left is the hydrant's — a drawing of the idea, not to scale and with no values.

Full specification — expand

System	A water supply the pumps can draw on, with a suction that cannot starve them; a pump set of a small jockey pump, a main pump and a standby pump, each started at its own falling pressure, with a controller for each; a main sized from the farthest hydrant, laid as a ring where it can be, with isolating valves; hydrants with outlet valves along it; a circulation relief so that a pump run with no flow does not overheat; a test line that returns water to the supply; pressure logging at the pump house and at the farthest hydrant; a written test plan; and testing and documentation before handover
The One Idea	Judge it at the farthest hydrant.
Why The Pump Is Not The System	A pump is tested at its own outlet, but the hydrants are at the end of a main and friction in the main takes its share of the pressure on the way, so a pump that passes its own test shows nothing about what the farthest hydrant gets
Why It Is Judged At The Farthest Hydrant	Pressure falls along the main with distance and falls faster at a higher flow, so the farthest hydrant has the least and fails first, and the main is sized from it and the system is proven there
Why The Pump And The Pipe Decide The Flow	A pump's head falls as its flow rises and a pipe's demand for head rises faster than the flow, so the pump works where the two curves cross, and a longer, rougher or older main moves that point to a lower flow
Why There Are Three Pumps	A jockey pump makes up small losses, the main pump starts when a hydrant opens and the pressure keeps falling, and the standby starts if the main does not hold it, each at its own falling pressure, and a main set to start low lets the pressure fall far before help arrives
Why A Pump Is Not Run Shut For Long	With no flow all the shaft power heats the water in the casing, so a run against a closed valve is short and a pump carries a small circulation relief that passes a trickle
Why The Water Supply Is Part Of The System	A pump can only deliver what its suction can feed, so the reservoir, the suction pipe and the water level are part of the design, because a pump that starves cannot deliver the curve it was bought for
Standards	NFPA 20 is the public reference for the installation of stationary pumps for fire protection, and its acceptance test runs a pump at no flow, at its rated flow and at an overload flow, while IS 13039 is the public reference for external hydrant systems. This page prints none of their pressures, flows or start set points, and no edition year: those come from the standard the customer names, from the authority the site answers to and from the site. Approval of a system for use rests with the customer and the authority they name; none is claimed here
Configurations	A pump house with a jockey, a main and a standby pump; a main and hydrants with valves; and a portable pump set that is engine driven
Scope Boundary	This page is the fire hydrant and pump system. It is not a facility that burns something to prove a fire-fighting system (see hangar fire test facility), not a rig that rates a building element by how long it resists fire (see fire resistance test rig) and not a gas pipeline system (see medical and industrial gas pipeline systems). Sprinkler, foam and gaseous systems, detection and alarm are separate systems and are outside this page. No certification is claimed here
Status	Neometrix has quoted against successive fire hydrant and fire water pump requirements, and no delivered fire water system is claimed.

Configurations

One method, three ways to supply the system.

The method, the test and the record are shared. What changes is how much of the system is supplied.

Pump house

Jockey, main and standby pumps

Three pumps on a pressure cascade, with a controller for each, a test line and a circulation relief, in a room or on a skid, for a site that needs a standing supply.

Main and hydrants

Pipe, valves and hydrants

The main sized from the farthest hydrant, with isolating valves and hydrants placed along it, for a site that already has pumps or a supply.

Portable pump set

Engine, pump and hose

An engine-driven set that can be taken to a water source, for a site with no pump house or as a second supply.

Fig · 06 — Three ways to supply the system, one method: a pump house, a main and hydrants, or a portable pump set.

And the part that is not equipment at all, yet decides all three: the test plan. It fixes the design flow, the farthest hydrant, the pressure to be read there and the order in which the pumps are to start, and it is written from the site and the standard, not from the pump.

Where it is used

Wherever a hose is connected at the end of a main, and the pressure has to be there.

The common thread is a site spread out enough for friction to matter.

Industrial plants and workshops

Where a long main runs between buildings and yards, and the farthest hydrant is a long way from the pump.

Campuses and large sites

Where a standing supply serves many buildings, and the system has to be proven at the far end.

Test facilities and laboratories

Where a facility has its own hydrants on a main, and a pump set that must start on its own.

Storage and loading yards

Where hydrants line a yard, the main is long, and a hose must reach any part of it.

Watch

See it in motion.

A short walkthrough video of the fire hydrant & pump system.

FAQ

Common questions.

Longer answers, for readers who want the reasoning.

Q · 01 What does a fire hydrant and pump system actually do?

It holds water ready under pressure and delivers it to hydrants, where hoses are connected. A pump set, a main and the hydrants work as one: the pumps raise the pressure, the main carries the water, and the hydrants hand it over. It does not put a fire out by itself and it does not detect one. It makes sure that when a hose is connected, the water is there at the pressure and flow the site was designed for.

Q · 02 Why is it judged at the farthest hydrant?

Because that is where it fails first. Pressure falls along the main with distance, and falls faster at a higher flow, so the farthest hydrant has the least. A pump that passes at its own outlet shows nothing about it. So the main is sized from the farthest hydrant, and the system is proven by reading the pressure there with the design flow running.

Q · 03 What decides the flow a pump actually gives?

The meeting of two curves. A pump's head falls as its flow rises. A pipe's demand for head rises faster than the flow. The pump works where the two curves cross, so a longer, rougher or older main moves the point to a lower flow. That is why the pipe is designed together with the pump, and why an old main can make a good pump deliver less than it was bought for.

Q · 04 Why three pumps, and what is the start order?

A jockey pump makes up small losses, so that a leak does not start the main pump. The main pump starts when a hydrant opens and the pressure keeps falling. The standby starts if the main does not hold the pressure. Each starts at its own falling pressure, set in order, the jockey first and the standby last. A main set to start too low lets the pressure fall far before it starts, and the hydrants feel the dip. The set points come from the design and the standard, and are checked by opening a hydrant.

Q · 05 Is this the same as the fire test, fire resistance or gas pipeline pages?

No, and the differences are worth stating precisely. The hangar fire test facility page covers a facility that burns a controlled fire to prove a fire-fighting system. The fire resistance test rig page covers a rig that rates a building element by how long it resists a fire. The medical and industrial gas pipeline systems page covers a piped gas system. This page is the water: the pump set, the main and the hydrants. It does not replace any of them, and it does not claim what they claim a second time.

Q · 06 Has Neometrix built one of these?

We would rather answer this plainly than let a page imply otherwise. Neometrix has quoted against successive fire hydrant and fire water pump requirements, and no delivered fire water system is claimed. What stands behind the offer is adjacent: Neometrix engineers fire test facilities (see the hangar fire test facility page), fire resistance test rigs (see the fire resistance test rig page) and piped gas systems (see the medical and industrial gas pipeline systems page). The pumps, engines, valves, hydrants, pipe and controllers are catalogue items, bought in, not invented. What Neometrix engineers is the system around them: the layout and sizing, the pump house and its start order, the test line, the testing and the record. So the honest position is that the system is engineered to order, the neighbouring disciplines are in the building, and the first system of this exact kind will be built around the customer's own site rather than taken off a shelf.

Q · 07 Which standards apply, and what can the system not do?

NFPA 20 is the public reference for the installation of stationary pumps for fire protection, and its acceptance test runs a pump at no flow, at its rated flow and at an overload flow. IS 13039 is the public reference for external hydrant systems. This page prints none of their pressures, flows or start set points, and no edition year: those come from the standard the customer names, from the authority the site answers to and from the site. The system supplies water and keeps a record. It does not certify a site or a design: this page claims no certification or accreditation. No pressure, flow or time figure is printed here, and approval for use rests with the customer and the authority they name; none is claimed here.

Q · 08 What do you need from us to quote?

Six things, and most of them describe your site rather than the system. First, the site: its layout, the length of the longest run and the heights. Second, the water: the source, its level and how long it must last. Third, the demand: the flow and the pressure wanted at the hydrant, and how many hydrants may be used together. Fourth, the pumps: electric, engine driven or both, and what is to stand by. Fifth, the controls: how the pumps start and what is reported. Sixth, the record: what you want kept with each test. From that we come back with a system concept, a written test plan you can check, and a budgetary price.

The neighbouring fire and piping pages, and how they differ from this one.

Three neighbours: one burns a fire, one rates an element, one pipes a gas.

↗ A fire test facility

Hangar Fire Test Facility

A facility that burns a controlled fire to prove a fire-fighting system - where this page is the water and the pumps such a system relies on.

↗ A fire rating rig

Fire Resistance Test Rig

A furnace rig that rates building and industrial elements by how long they resist a fire - a test of an element, where this page is a working system.

↗ A piped system

Medical & Industrial Gas Pipeline Systems

A turnkey piped gas system with pipes, valves and outlets - where this page is piped water for fire fighting.

Browse all Neometrix product lines.

Get a quotation

Tell us the site, the water,
and the demand.

The projects desk replies within two working days with a system concept, a written test plan you can check, and a budgetary quotation. Write to [email protected] or use the form.

Enquire — hydrant system Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 ENGINEERED-TO-ORDER CLASS — FIRE HYDRANT AND PUMP SYSTEM SPECIFY · SIZE · INSTALL · COMMISSION · TEST · PROVE — JUDGE IT AT THE FARTHEST HYDRANT ENGINEERED IN NOIDA · INDIA