Home
Products
Water meters
Single Jet Brass Body Water Meter

A Metrys single-jet water meter with a brass body and a blue register ring and lid.

Single-jet water meter, drawn illustration

Water meters SJ-B

Single Jet Brass Body Water Meter

A brass single-jet meter, DN15 to DN40, painted or nickel coated.

Nominal size: DN15
Q3 permanent flow: 1.5 m³/h
Accuracy class: Class B (ISO 4064:1993)
Maximum working pressure: 16 bar

Select nominal size (DN)

Specifications update with the selected size.

DN15 ½″ DN20 ¾″ DN25 1″ DN32 1¼″ DN40 1½″

Documents

Download datasheet

Overview

Why buyers choose it

Light enough to hang

0.57 kg at DN15, so a service pipe carries it without a bracket or a chamber.
Five or eight wheels

The dial range is chosen for the scheme rather than fixed by the meter.

Painted or nickel coated

The coating decides how the meter looks after five years in a wet box, so it is a specification, not a finish.
Frost resistant register

Vacuum sealed, so a cold snap does not split the dial and lose the reading.

In detail

The workhorse single-jet in brass, covering DN15 to DN40 with nominal flows from 1.5 to 10 m³/h. At 0.57 kg for the DN15 it is light enough to hang on a service pipe without a support, which is most of why single-jet meters remain the default on a domestic connection.

The register is dry, vacuum sealed and frost resistant, with five or eight number wheels depending on how much dial range the scheme wants. The drive is magnetic and shielded against an external magnet. The body can be supplied painted or nickel coated — the coating being the part that decides whether the meter still looks like a meter after five years in a wet box.

It is declared to ISO 4064:1993 in accuracy class B. Where a specification calls for the current edition's class 2 and the Q1–Q4 flow points, the single-jet with the copper and glass register is the one that answers it.

Where it is used

Domestic
Apartment and society

Standards

ISO 4064

Technical specifications

Selected size: DN15

Values shown apply to the selected size. A dash means the figure is not stated.

Metrological

Nominal size	DN15
Accuracy class	Class B (ISO 4064:1993)
Register type	Single jet, dry dial, vacuum sealed
Maximum permissible error, Q1 to Q2	±5%
Maximum permissible error, Q2 to Q4	±2% (hot-water version ±3%)

Hydraulic

Q3 permanent flow	1.5 m³/h
Q1 minimum flow	0.03 m³/h
Maximum working pressure	16 bar
Q2 transitional flow	0.12 m³/h
Q4 overload flow	3 m³/h

Materials

Body material	Brass, painted or nickel coated; plastic body optional

Environmental

Temperature class	≤30 °C (hot-water version ≤90 °C)

Approvals

Standards	ISO 4064:1993

Dimensions and installation

Connection thread	G3/4" B
Length	110 mm
Weight	0.57 kg
Height	80 mm
Width	77 mm

Parts

Parts of a single-jet meter

How a meter of this type is built, and what this model is made of.

Illustrative: how a meter of this type is built. This model's own materials and figures are in the table and its specifications.

Lid

Caps the register and keeps water and debris off the dial.
Register

Totalises and displays the water passed.

Register type Single jet, dry dial, vacuum sealed
Register seal

Seals the register housing against water ingress.
Measuring chamber

Directs the single tangential jet onto the impeller.
Impeller

Turns with the jet of water and drives the register.
Strainer

Screens out grit and debris before the measuring element.
Body

Houses the measuring element and carries the flow.

Body material Brass, painted or nickel coated; plastic body optional
Tailpieces / connections

Threaded couplings that join the meter to the pipework.

Connection thread G3/4" B

Download centre

Everything you need to specify.

Documents for the Single Jet Brass Body Water Meter.

Approvals and certificates

Single Jet Brass Body Water Meter

Why buyers choose it

Light enough to hang

Five or eight wheels

Painted or nickel coated