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Discuss Vaillant aqua plus water pressure low in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Hi, my ten plus year old Vaillant aqua plus boiler water pressure is low, however its not a conventional valve top open, I've purchased a
key filling valve - below, unfortunately it doesn't fit the valve due to valve being previously opened with a flat screwdriver which has misshaped/worn out the valve. I've read somewhere that I could leave one end of the loop open to slowly increase pressure, is this correct? I've uploaded a photo if anyone can help!

VAILLANT AQUA PLUS VUI 362-7 & 362-7 R3 FILLING VALVE HANDLE KEY 125151 ORIGINAL | eBay

20190509_192632.jpg
 

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