Clack WS2H Filter Meter Controlled Valve 2" (Includes Internal Meter) V2HBMZ-05

The Clack WS2H Filter Meter Controlled Valve 2" (V2HBMZ-05) is a complete commercial-grade filter control valve with an internal meter fitted as standard, supplied by WrekinWater for large-volume filtration installations that need usage-based backwash control rather than a fixed timer. Built on Clack's proven WS2H platform, this 2" valve is designed to sit at the heart of high-flow commercial and industrial filtration vessels, triggering a backwash cycle only when the metered throughput demands it, so the media bed is cleaned efficiently without wasting water on unnecessary cycles.

Technical specifications

Symptoms that mean you need this part

• The commercial filtration system is backwashing erratically or has stopped initiating backwash cycles altogether
• Water pressure across the filter vessel has dropped noticeably, suggesting the existing valve or meter mechanism is failing
• The internal meter is under-reading or over-reading throughput, causing backwash cycles at the wrong intervals
• Visible cracking, leaking or seized components on the existing 2" valve body, typical of a unit reaching end of service life

Why it fails / why it matters

On a commercial-scale filtration system, the meter-controlled valve is doing constant, high-volume work — every litre that passes through the vessel is measured, and that reading drives when the unit backwashes to flush out accumulated iron, sediment or organic fouling from the media. Over years of continuous commercial use, the internal meter's moving parts wear, seals harden and lose their seat, and the valve body itself can be damaged by high flow rates, water hammer or mineral fouling, all of which lead to inaccurate metering or a valve that no longer cycles reliably — at which point the whole assembly, rather than an individual seal kit, typically needs replacing.

Why buy this from WrekinWater

WrekinWater has served more than 50,000 customers over 15 years from its base in Bettisfield, Shropshire, and stocks genuine Clack, Pentair Fleck, Autotrol and Kinetico parts for exactly this kind of commercial specification work. As a UK-registered company (Company No. 11000488) rated Excellent on Trustpilot, WrekinWater can supply this Clack WS2H valve assembly directly to your water treatment installer or engineer, backed by real technical stock knowledge rather than a generic parts listing.

How to fit it

1. This is a commercial-scale valve assembly and must be commissioned by a qualified water treatment engineer or installer — do not attempt a DIY fit
2. The engineer isolates the filtration system, relieves system pressure and shuts off the incoming supply before any work begins
3. The vessel is drained down and the existing 2" valve and meter assembly is disconnected from the filter tank and pipework
4. The new Clack WS2H V2HBMZ-05 valve, with its internal meter, is fitted to the filter vessel and reconnected to the system pipework
5. The engineer programmes the valve's backwash parameters to match the specific filter media, vessel size and site flow rate
6. The system is repressurised and run through a full backwash cycle while the engineer checks for leaks and confirms correct meter operation