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by Notajock
Fri Feb 12, 2016 5:41 pm
Forum: Plumbing Forum
Topic: Cavitation Air Bubbles in Hot Water Circuit and Fitting Venting Valve
Replies: 1
Views: 2610

Re: Cavitation Air Bubbles in Hot Water Circuit and Fitting Venting Valve

Actually I can't strictly say that cavitation is happening here. There are a lot of air bubbles circulating around, some of the time. But if the existing Grundfoss circulation pump has coped for 10 years under these conditions, would not a well built pump like a Stuart Turner survive? Any thoughts o...
by Notajock
Tue Feb 09, 2016 9:17 pm
Forum: Plumbing Forum
Topic: Cavitation Air Bubbles in Hot Water Circuit and Fitting Venting Valve
Replies: 1
Views: 2610

Cavitation Air Bubbles in Hot Water Circuit and Fitting Venting Valve

I'm renewing a shower pump in main bathroom on 1st floor of 4 floor Georgian townhouse. It has a vented system, CH header and HW and CW feeder tanks in roofspace, and Vaillant boiler and two cylinders in the basement. HW is pumped around the whole house, to the roof and back in 28mm copper by a grun...
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