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phowardstutterheim
@phowardstutterheim
Member
Trusted Member
Joined: Jan 16, 2023
Last seen: Mar 18, 2026
Profile Activity
Topics: 2 / Replies: 40
AllTopicsReplies
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

@derek-m It's interesting what you say. We didn't understand how Octopus deals with exports when we signed up. We signed up with them because they p...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

@transparent The borehole pump is a Rovatti 4ES8 - it is a .75 kW, 2A 3-phase. The circulating pump that I mentioned, Grundfos, is single phase. We...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

@heacol Sorry, I made a mistake. My husband told me that he doesn't use high pressure - he backflushes (we had valves installed for that purpose).

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

Hi Derek, That's an interesting idea that we haven't entertained, and might have entertained if we were at the initial stages again. The question of...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

@heacol We have no extraction licence as our extraction is below 20 cubic metres per day (we have the calculations of how much we use for heating and ...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

Very good. I just sent the Hythe group an email saying we want to participate in discussions - although it would be much better if you could get here!...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

Very instructive - we have 100 solar panels and no storage capacity so will be very interested in these discussions! The drilling companies were bot...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

You are brill! Didn't know I had a Building Control Application for the GSH system! I have the DNO and the electrical test certificate, the HW Commiss...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

@transparent @transparent We have no idea about Building Control - we didn't know they should have been informed about the GSHP system installation a...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

We thoroughly investigated filters that might be installed to remove the clay particles from the water before the pump and heat exchanger. Unfortunate...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

We have an open loop system that involves a borehole pump, a buffer tank, a pipe run to a plant room, a variable speed pump, and a plate heat exchange...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: No spare parts for Vaillant Ground Source Heat Pumps in the UK & major corrosion issue is another problem for GSHP

@mjr If Vaillant didn't have these parts in Germany I would agree. But they are apparently widely available across the EU, with distributors often off...

3 years ago
Forum
Ground Source Heat Pump (GSHPs)
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