EN 14506:2005 – Devices to prevent pollution by backflow of potable water – Automatic diverter – Family H, type C
1 Scope
This document specifies:
a) field of application;
b) requirements for automatic diverters;
c) dimensional and the physico-chemical properties and the properties of general hydraulic, mechanical and acoustic design of automatic diverters;
d) test method and requirements for verifying these properties. For sanitary tapware (see Clause 2) with integrated devices, the automatic diverter is only considered to be a backflow protection device if it has passed the requirements of this document and additionally those of the applicable product standard for the draw off tap or mixing valve;
e) marking and presentation;
f) acoustics.
This document specifies the characteristics of automatic diverters suitable for use in drinking water systems at pressures up to 1 MPa (10 bar) and temperatures up to 65 °C and for 1 h at 90 °C. They are intended only for installation with no downstream closing device.
This document is applicable to the product type indicated as follows:
i) integrated in spout (outlet);
ii) integrated in the mixing body;
iii) non-integrated (part of a set) above the maximum water level.
This document is not applicable to the product type non-integrated below the maximum water level.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 200, Sanitary tapware — Single taps and combination taps (PN 10) – General technical specification
EN 248, Sanitary tapware — General specification for electrodeposited coatings of Ni-Cr
EN 806-1:2000, Specifications for installations inside buildings conveying water for human consumption — Part 1: General
EN 817, Sanitary tapware — Mechanical mixers (PN 10) — General technical specifications
EN 1111, Sanitary tapware — Thermostatic mixing valves (PN 10) — General technical specification
EN 1112, Shower outlets for (PN 10) sanitary tapware
EN 1113, Showers hoses for (PN 10) sanitary tapware
EN 1286, Sanitary tapware — Low pressure mechanical mixing valves — General technical specification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1717:2000 and EN 806-1:2000 and the following apply.
automatic diverter
part of sanitary tapware capable of switching the water supply from the shower hose outlet (secondary outlet) to the bath outlet (primary outlet) in the event of insufficient supply pressure. It incorporates the following characteristics:
a) means of manually diverting flow to a hose outlet and of maintaining diversion as long as a positive supply pressure is maintained;
b) automatic closure of the hose outlet with anticipation and return to air gap discharge when the supply pressure falls below a prescribed minimum;
c) sufficient mechanical loading to maintain closure of the hose outlet in the event of a negative supply pressure.
For the purpose of this document “automatic diverter HC “is hereafter referred to as “device(s)”
4 Nominal size and pressure ranges
The nominal size of non-integrated devices (DN) shall correspond to the denomination of the thread according to Table 1.
Nominal size is not applicable to integrated devices.
For specifications of threads please see 8.2.
EN 14506:2005 – Devices to prevent pollution by backflow of potable water – Automatic diverter – Family H, type C