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I recently removed the DHW plate hex on my Vaillant Turbomax to descale it. The o rings were fine, so I just petrol. jellied them and reused.
It did occur to me that if I wanted to replace them, I have large selection boxes of metric and imperial o rings. In the absence of the manufacturer's replacement o rings for that specific application, how would you measure the old ones to choose a replacement? Would you do it by eye, or is there a good o ring measure?
Or would heating engineers and plumbers always use the o rings from the manufacturer of the boiler, etc?
By the way, the Turbomax's hw is now scorching, and as good as new. Did both sides of the plate hex, first with citric acid, then 10 mins with some Spirits Of Salt. There was also rust flakes in the primary side. The acid seemed to dissolve this as well as the scale. Thanks to all for advice on this recently!
It did occur to me that if I wanted to replace them, I have large selection boxes of metric and imperial o rings. In the absence of the manufacturer's replacement o rings for that specific application, how would you measure the old ones to choose a replacement? Would you do it by eye, or is there a good o ring measure?
Or would heating engineers and plumbers always use the o rings from the manufacturer of the boiler, etc?
By the way, the Turbomax's hw is now scorching, and as good as new. Did both sides of the plate hex, first with citric acid, then 10 mins with some Spirits Of Salt. There was also rust flakes in the primary side. The acid seemed to dissolve this as well as the scale. Thanks to all for advice on this recently!
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