R160 Volumetric Water Meter

A rotary piston meter for connections from DN15 to DN40.

Nominal size: DN15
Q3 permanent flow: 2.5 m³/h
R value (Q3/Q1): 160
Accuracy class: 2

Select nominal size (DN)

Specifications update with the selected size.

DN15 ½″ DN20 ¾″ DN25 1″ DN40 1½″

Documents

Download datasheet

Overview

Why buyers choose it

Registers the slow leak

Displacement measurement keeps counting at flows where a jet meter has stalled, which is where a weeping cistern hides.
No straight pipe needed

Flow profile sensitivity U0 D0 means no upstream or downstream straight length, so it fits a crowded manifold.

Horizontal or vertical

The meter is declared for both orientations, which decides the layout rather than the layout deciding the meter.
R160 at class 2

The turndown and the accuracy class are declared together, so the low-flow claim is one a tender can check.

In detail

A volumetric meter fills and empties a chamber of known size, counting the fills. Because it measures displacement rather than the speed of a jet, it keeps registering at flows where a jet meter has stalled — which is why it is specified where the loss that matters is a slow one.

That is the case a housing society knows well: a cistern valve weeping overnight, or a service pipe seeping under a slab. Those flows sit far below what a multi-jet meter will register, so the water leaves the network unmeasured and turns up as the gap between the bulk meter and the sum of the individual ones.

This meter covers DN15 to DN40 with permanent flows from 2.5 to 16 m³/h, at class 2 accuracy across an R160 turndown. Its flow profile sensitivity is U0 D0 — it needs no straight pipe upstream or down — and it can be installed horizontally or vertically, which between them make it the easy meter to fit into a crowded manifold.

Where it is used

Domestic
Apartment and society
Commercial

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
R value (Q3/Q1)	160
Accuracy class	2
Register type	Rotary piston, dry dial
Maximum permissible error, Q1 to Q2	±5%
Maximum permissible error, Q2 to Q4	±2% for water having a temperature ≤30℃
Indicating range	9,999
Resolution of indicating device	0.001

Hydraulic

Q3 permanent flow	2.5 m³/h
Q1 minimum flow	0.015625 m³/h
Maximum working pressure	16 bar
Pressure loss class	ΔP63
Q2 transitional flow	0.025 m³/h
Q4 overload flow	3.125 m³/h
Flow profile sensitivity class	U0 D0

Environmental

Temperature class	T30

Approvals

Standards	ISO 4064

Dimensions and installation

Connection thread	G3/4" B
Length	115 mm
Orientation limitation	Horizontal or vertical
Width	90 mm

Parts

Parts of a volumetric 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 Rotary piston, dry dial
Register seal

Seals the register housing against water ingress.
Chamber cover

Bolted cover sealing the piston chamber.
Rotary piston

Nutating piston that displaces a fixed volume each rotation and drives the register.
Strainer

Screens out grit and debris before the measuring element.
Body

Houses the measuring element and carries the flow.
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 R160 Volumetric Water Meter.

Approvals and certificates

R160 Volumetric Water Meter

Why buyers choose it

Registers the slow leak

No straight pipe needed

Horizontal or vertical