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Makes sense that it is the valve causing the pump to engage. Think I may have a spare cartridge somewhere to try.
will post back...
Just wanted to say Hi from Spalding.
Noob to the forum, just a DIYer with an issue posted in the Bathroom section.
Looks like a great forum so...
As above I have a Salamander ESP 100 CPV working in a negative head arrangement.
This has been installed for approximately 18 months with no...
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