Single pump installation

[nickdesign]

Please don't shoot me down in flames -

Am looking to install a Stuart turner monsoon single pump on a dedicated feed from a communal hot water supply that runs through our flats - are there any valves that should be installed between this feed and the pump?


Thanks for any help!

 

[kevplumb]

an isolation valve and a non return valve

would be a good idea

 

[nickdesign]

Hi Kev,

Thanks for reply - was going to put an isolation valve, so glad am along the right lines!

Some manufacturers specifically say do not put a non-return valve in to allow the pump to vent back if need be - is this the case with the Stuart Turner Monsoon ones?

Am I right in thinking that because the Monsoon uses a flow switch it shouldn't be triggered by a pressure change elsewhere in the system before the pump?

Thanks for help again!

 

[nickdesign]

bump - anyone?

 

[ChrisR]

It depends which ST Monsoon you use. The installation instrs should be online.?

 

[nickdesign]

Am probably going for the ST Monsoon 3bar single - which by the looks of it has a flow switch?

 

[Fluffster]

What is the capacity of the communal store and what size are the delivery pipes. How far away is the communal store and how many units does it serve.

You may have issues if you drain the store down leaving your neighbours with cold showers!

Pete

 

[nickdesign]

Hi Pete,

no danger of draining down the communal store, serves 24 flats - but the pipework i'm using only serves three directly, the communal store is held in the basement and then pumped round the pipework - have been told by our plumbers that this means it counts as a positive head.

We are on the 1st floor, so the store is in the basement and then pumped in a circuit through the three floors.

The delivery pipes are 22mm or thereabouts (cast iron pipework!)

Does this all make sense?

 

[Fluffster]

Yes makes sense however if it is pumped what flow and pressure is it currently?

I doubt if your pump will pull the hot water through the communal pump at an expected rate.

Pete

 

[nickdesign]

Hi Pete,

thanks for reply - do you think it will just mean a slightly lower level of performance, or do you think it won't work at all?

 

[Fluffster]

I doubt you will pull the hot water any faster and may even cause the pump to cavitate which happens when it sucks in air which will damage the pump.

Have you checked your lease about installing a pump? At least speak to the maintenance man/company and ask them if this is possible before you go to the expense of purchasing a pump.

Pete

 

[nickdesign]

Hi Pete,

thanks very much for being so much help - really appreciate it.

I did speak to the firm we contract and they thought it will be okay - but I am going to give him another call tomorrow and see what he has to say regarding the potential issues you've raised!

Thanks again!