Discharge Line Pressure Gauge

Name: Discharge Line Pressure Gauge
Brand: Ayso Fire Protection

A discharge line pressure gauge allows the pressure on the outlet side of the fire pump to be monitored. It is used for reliable reading of system pressure during pump tests and routine checks. System pressure, scale range and connection size are evaluated together when selecting a pump discharge pressure gauge.

WIKA 111.10SP UL Listed and FM Approved Sprinkler Pressure Gauge

The WIKA Type 111.10SP is a Bourdon tube pressure gauge developed for fire sprinkler systems. It is UL 393 listed for the USA and Canada and FM (Factory Mutual) approved. Its 4″ (100 mm) dial is designed to EN 837-1 and ASME B40.100.

Scales of 0/300, 0/400 and 0/600 psi are available for water service and 0/80 psi (retard 250 psi) for air service. Accuracy is ±3/2/3% of span per ASME B40.100 Grade B. It is recommended to select a scale so that continuous working pressure does not exceed 3/4 of full scale.

The gauge is made with a copper-alloy C-type Bourdon tube, 1/4″ NPT lower mount connection, black polycarbonate case and snap-fit polycarbonate window. Discharge line pressure gauges can also be supplied under the Winters brand.

Discharge Line Pressure Gauge Technical Specifications

Specification	Value
Dial Size	4″ (100 mm)
Measuring Ranges	0/300, 0/400, 0/600 psi (water); 0/80 psi retard 250 psi (air)
Accuracy	±3/2/3% (ASME B40.100 Grade B)
Working Pressure	Steady: 3/4 of full scale; fluctuating: 2/3
Temperature	Ambient: -40 – 60 °C; medium: max. 60 °C
Connection	1/4″ NPT, lower mount, copper alloy
Case / Window	Black polycarbonate / snap-fit clear polycarbonate
Approvals	UL 393 listed; FM approved (Standard 2311, PR456793)

Technical values are based on manufacturer documents; confirm against the current data sheet before ordering.

Discharge Line Pressure Gauge Applications

Fire pump discharge (outlet) line

Sprinkler systems and alarm valve trims

Pressure readings during pump performance tests

Fire hose cabinet and hydrant lines

Related Fire Pump Accessories

Other equipment considered together with the Discharge Line Pressure Gauge in the fire pump room:

Frequently Asked Questions

Why is a discharge line pressure gauge used?

It is used to monitor the pump discharge pressure, read pressure values during performance tests and check that the system is operating normally.

Is the 111.10SP UL and FM approved?

Yes. The gauge is UL 393 listed and FM approved (Standard 2311, PR456793).

Which scale should be selected?

Selection is based on system pressure. According to the manufacturer, continuous working pressure should not exceed 3/4 of full scale. 0/300, 0/400 and 0/600 psi options are available for water service.

Is a dual scale option available?

Yes. Dual scales in psi together with bar, kPa, MPa or kg/cm² are offered. The manufacturer notes that not all options are UL/FM approved.

What is the connection size?

The standard connection is 1/4″ NPT, lower mount.

In which environments can it be used?

It can be used with media that do not clog the pressure system and are not aggressive to copper-alloy parts.