Whole house pump :- How does this layout look?

[jonnywells]

Right kinda carrying on from o another thread (//www.diynot.com/forums/viewtopic.php?t=138425&highlight=) decided to attempt to install a whole house pump myself as Im currently unable to find a pumper who is willing to do it without trying to sell me a megaflow/don’t think can be done.

I had a plumber I found around off the iphe website and he is quoting around £2100 to have a unvented cylinder put in.

Although the idea of no noise at all is appealing im quite confident I will be able to quite the pump down using various methods found on this forum. Also know pumps don’t last for ever but if I have to change the pump in say 5 years time it will still be only £200 odd.

Anyway back to the main topic, here is my super armature paint diagram of what im thinking of doing with the pipe work

I welcome any comments………..pump will be a Salamander RHP 75

 

[cowboyplumber]

Doesn't look good

 

[doitall]

I can honestly say I wouldn't do it like that and expect a good job

Use an Essex flange.

Whats the hight of the storage tank above the pump.

What volume is the stored water

 

[jonnywells]

Doesn't look good

lol good start

Cold storage is a 100 gallon tank. The cold tank is about a meter + half above where the pump will be (cold tank on a raised platform)

Only reason i looked at a surrey as it was a simple swap around, have looked at the techflange as well

 

[doitall]

Essex or Techflange is good.

You want to avoid the wc being on the pump where possible.

Simple is good but not the best way to install it.

 

[Registered Gas Man]

I would recommend that you make provision for the pump breaking down and connect directly to the DHW before the pump using a gate valve to isolate this branch in pipework.

Then if the pump does knacker at least you have a way of getting some hot water even if it is at a reduced flow rate.

Surrey are a bit of a pain to install, but i would use a Warix.

 

[doitall]

I would recommend that you make provision for the pump breaking down and connect directly to the DHW before the pump using a gate valve to isolate this branch in pipework.

Then if the pump does knacker at least you have a way of getting some hot water even if it is at a reduced flow rate.

Surrey are a bit of a pain to install, but i would use a Warix.

Restricts the flow too much, especially on an whole house pump.

 

[jonnywells]

toilets are all mains feed so thats ok, i will put a non return value on the washing machine feed.


If pump does pack up one day (they do last a while) im 99% sure that you will still get hot water just not at pressure