9 - 1000211 - For 9in Diameter Vessel 2gpm/7.6lpm Backwash Flow Controller for Autotrol Valves (No Ball Included)

The 1000211 is a fixed-orifice backwash flow controller sized for 9in diameter resin vessels, rated at 2gpm (7.6lpm), fitting into the drain line flow control (DLFC) housing on Autotrol control valves without needing a separate ball. It sets the backwash flow rate so the resin bed in a 9in vessel lifts and cleans correctly without media being washed away to drain. This is the correct replacement when rebuilding a 9in vessel or replacing a worn controller, stocked by WrekinWater.

Technical specifications

Symptoms that mean you need this part

• Resin or media grit turning up in the drain water during backwash on a 9in vessel
• Backwash appears weak and doesn't seem to fully lift or expand the bed
• Softening or filtration performance declining despite the resin or media being in good condition
• The old controller washer is cracked, deformed or missing from the DLFC housing

Why it fails / why it matters

A 9in vessel needs a backwash flow rate proportioned to its cross-section to achieve correct bed expansion without carrying resin out to drain, which is why the 1000211 is calibrated specifically to 2gpm for this vessel size. Fitting a worn, missing or incorrectly sized controller either under-cleans the bed, leaving it prone to channelling and reduced capacity, or over-flows it and strips resin away over time.

Why buy this from WrekinWater

WrekinWater stocks the complete Autotrol flow controller range by vessel size, alongside Pentair Fleck, Clack and Kinetico spares, built up over more than 15 years trading from Bettisfield, Shropshire (UK Company No. 11000488) and over 50,000 customers served. With stock ready to dispatch and an Excellent Trustpilot rating, sourcing the correct controller for a 9in vessel rebuild is simple.

How to fit it

1. Isolate the softener at the bypass and shut off the mains supply
2. Locate the drain line flow control (DLFC) housing on the control valve body
3. Release the retaining cap or clip and remove the old flow controller washer
4. Fit the new 1000211 controller, checking the o-ring is present and undamaged
5. Refit the DLFC cap securely and restore the mains supply
6. Run a manual regeneration and check the backwash flow rate at the drain matches the 2gpm rating