F & E tank supply.

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Hi folks,
I'm about to replace an F & E tank in my loft. It's supplied from a tee off the main: about 2.5 metres from tee to tank.
Since the float valve will rarely, if ever, open after initial filling, and therefore result in 2.5m of stagnant water, should I be fitting a check valve close to the tee or some other arrangement? Concerned that I'll effectively have a lengthy dead-leg.

Many thanks for reading...
 
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1000’s of Homes don’t but if it helps you sleep at night... go ahead, if it’s easily accessible for future replacement then it’ll do no harm :)

Edit: if you also have a CWSC in the loft then run pipe to F&E first and Tee off that to CWSC.
 
Thanks for that. The CWSC is being removed, so can't tee as you suggested.
 
Are you jumping the cold main over to the existing down cold feed from the CWSC during its removal? If so, do this in the loft and same thing I said before... bring it over to the F&E and then T off the down feed from there.

Or better still... seal up (pressurise) the Heating system and get rid of the F&E!
 
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I would have done that, but I re-purposed the existing cold outlet from the CWSC (3/4") as the vent from the cylinder - it was 1/2" vent originally and I wasn't happy about that. I suppose I could have reused the old vent for the main, but I didn't think of that at the time...

There's a check valve in now.

The F&E tank is actually for the cylinder which I've turned into a heatbank (with surprisingly excellent results), so it will be staying. Boiler is already sealed/pressurised.
 

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