Discuss Stuart Turner M300SV mainsboost in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Steve weightman

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Evening all,
A regular customer of mine who has a beauty salon and a hairdressers shop adjoining each other and running off the same inlet water main has decided without getting advice to purchase the accumilator because of low water pressure apart from a structurel weight bearing issue the incoming mains is 15mm would i be right in saying this is inadequate
Thanks
 
B

Burger

I think that would all depend on outlet usage/loading units. Any way of upgrading?
 
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Steve, I fit a lot of accumulator systems. To be effective they generally need to have a stored capacity of at least 200 litres and preferably 400litres. The later will deal will a poor flow rate on the recharge cycle.

In general terms ( domestic properties) aim to design for a pressure of 4.5bar with a flow of 30 lites / minute.

Avoid the approved pumps that “suck” from the mains. I work in the Thanes Water area, even with the WRAS pumps, once they realise one is installed they instal a restrictor ahead of the meter !

A final point, they really need to be installed on the ground floor - don’t be fooled by the Stuart Turner iboost solution - it is excellent in a plant room, but not in a kitchen cupboard ( unless you are hard of hearing!)

Hope this helps
 
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Steve weightman

Steve weightman

Gas Engineer
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I think that would all depend on outlet usage/loading units. Any way of upgrading?
In the first beauty salon the pressure is ok but for the salon where the cold feed T's and goes through a wall to is for the salon and there finding the individual instant hot water points for hair washing are dropping as the toilets flushed etc
 
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Steve weightman

Steve weightman

Gas Engineer
Messages
169
Reaction score
32
Steve, I fit a lot of accumulator systems. To be effective they generally need to have a stored capacity of at least 200 litres and preferably 400litres. The later will deal will a poor flow rate on the recharge cycle.

In general terms ( domestic properties) aim to design for a pressure of 4.5bar with a flow of 30 lites / minute.

Avoid the approved pumps that “suck” from the mains. I work in the Thanes Water area, even with the WRAS pumps, once they realise one is installed they instal a restrictor ahead of the meter !

A final point, they really need to be installed on the ground floor - don’t be fooled by the Stuart Turner iboost solution - it is excellent in a plant room, but not in a kitchen cupboard ( unless you are hard of hearing!)

Hope this helps
Good advice thanks. The storage on this is 174 litre and the weight on the first floor will be 347kg . The usage is for hair washing mainly from instant hot water points so maybe 174 litre may be fine
 

ShaunCorbs

S. Mod
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whats the flow rate of the main now?
 
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Steve,

If you can send me the pressures (static and dynamic) and flow rates, outlet heights et al - I am happy to give you an indicative design. If you also let me know the pump specification and elevation of the accumulator and outlets - I can give you expected flow rates and pressure.

It won’t be spot on - but I have a lot of empirical data as to how these units perform.

Without putting a negative slant on this topic, an M300sv is “up against it” at first floor level in a commercial property unless the incoming flow is greater than 10 litres/minute.

Stuart Turner in Henley are very responsive. In my experience, they don’t want their products installed in the wrong situations and are very keen to work with you to get the right solution.

In the Thames Water area low (crap) flows and pressures are a very common problem - they only want to be associated with success
 
Last edited:
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Steve weightman

Steve weightman

Gas Engineer
Messages
169
Reaction score
32
Steve,

If you can send me the pressures (static and dynamic) and flow rates, outlet heights et al - I am happy to give you an indicative design. If you also let me know the pump specification and elevation of the accumulator and outlets - I can give you expected flow rates and pressure.

It won’t be spot on - but I have a lot of empirical data as to how these units perform.
Yes if that's ok. I need to wait until the salon landlords back to take a look. Thanks
 
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