Isolation valve fitted wrong way around

[Madrab]

Type in full bore isolation valves, their internal diameter is 15mm against approx 8mm for standard ball valves

 

[starfire]

what's the flow like ?

Same as the old tap, slow, but OK for what it gets used for - brushing teeth mainly (new tap box states for use with both low & high pressure systems)

ps. as a backup in case I had issues with the isolation valve I closed the gate valve feeding cold water into bottom of hot cylinder but hot water continued to flow from taps and I could hear the cold tank refilling in the loft so guess its broken, only had it replaced about a year ago I think

 

[starfire]

Type in full bore isolation valves, their internal diameter is 15mm against approx 8mm for standard ball valves

OK thanks, guess no way of easily telling what has been fitted ? Special markings for a full bore?

 

[Madrab]

Yep, they look different, look up full bore isolation valve, their body shape is fatter, it's reasonably obvious which ones you'll have.

 

[starfire]

Ah thanks, mine are all cheap standard ones then

 

[dilalio]

Ah thanks, mine are all cheap standard ones then

Yep. Gotta go full bore- especially on gravity - any restrictions reduce the flow and the number of elbows in a run all have a cumulative effect.

Edit: or is that "depreciative" ?

 

[terryplumb]

afraid gate valves are notorious for failing to close ,and open. if you ever replace go for full bore lever operated,miles better .

 

[dilalio]

afraid gate valves are notorious for failing to close ,and open. if you ever replace go for full bore lever operated,miles better .

+1.
All day long