Unvented cylinder size

[ShaunCorbs]

Cws tank to current vented cylinder....yes.
Why does the feed and expansion for the boiler need to be a mimimum 2m??

To have a high resistance so when hot water only is on it doesn’t pump over

 

[Chuck]

Its mad...things are going to crash soon...people simply arnt earning enough to pay the trades going rates
...

Don't like their price? Then just ask another firm to give you a quote.

 

[Notagainpike]

To have a high resistance so when hot water only is on it doesn’t pump over

Thanks Shaun....think i need to rethink or fully understand what im needing ot what people are trying to inatall!....

 

[Notagainpike]

Don't like their price? Then just ask another firm to give you a quote.

and there lies the problem. Ring and leave messages and never get a response!
6 different people...

 

[Sparkgap]

To have a high resistance so when hot water only is on it doesn’t pump over

You are assuming the feed and vent are connected either side of the boiler? I'd have the feed and vent both on the suction side of the pump on a low head system, no pumping over and only consideration is enough head to prevent cavitation.

 

[Notagainpike]

You are assuming the feed and vent are connected either side of the boiler? I'd have the feed and vent both on the suction side of the pump on a low head system, no pumping over and only consideration is enough head to prevent cavitation.

Bit beond me at present tbh...

 

[Sparkgap]

Like this. Both cold feed and vent on the flow pipe off the boiler.

 

[Notagainpike]

Like this. Both cold feed and vent on the flow pipe off the boiler.

I have no F+E tank

 

[Basher]

I have no F+E tank

You mentioned one in post #56
"Raise f+e tank in loft."

 

[Notagainpike]

You mentioned one in post #56
"Raise f+e tank in loft."

Removed now