I'm doing some work on my CH system (which runs off a Duo-tec Combi HE A Range 28 model) and I'm intending to use some JG Speedfit plastic fittings (tees and elbows). The Screwfix catalogue says that these are suitable for pressurized and combi systems but I'd be interested to know if the lads on here think that's ok or not. Thanks.
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