Showermate issues after swapping old for new | Showers and Wetrooms Advice | Plumbers Forums

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Discuss Showermate issues after swapping old for new in the Showers and Wetrooms Advice area at Plumbers Forums

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Hi, just wondering if anyone has some advice!

Changed a showermate pump in the week, old one was a 1.4 twin but apparently this isnt made anymore so i swapped with a 1.8 twin.

The issue is now the shower pump kicks in on hot only. As i get further round to cold the pump stops. Ive read the old shower pump needed a minimum of 0.5bar inlet whereas this new 1.8 pump needs a minimum of 0.8bar. Could this be the issue or am i missing something else more obvious? All pipework etc is exisiting, i just changed hoses and pump.

Sods law it went on the hottest week of the year when customer wants a cooler shower as at any other time this issuue wouldnt of been noticed!

Is there aa boosting pump i can put on my cold suppy from the tank to increase that pressure upto 0.8bar.

Should add its a gravity system, tank in loft and cylinder in airing cupboard.

Thanks in advance
 
The 1.8 requires 0.8 litres per minute flow, not 0.8 bar pressure.

I'd be looking for a restriction in the cold feed, for example if the isolating valve in the flexible input hose is not fully open.
 
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its not the shower is it ? , also have you checked the shower strainers ?
 
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Ok thankyou

Screenshot_20170531-104026.png
 
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