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Dave Walker
Doing a install at the moment and we have a casva valve that has been supplied with the kit. There are 3 of us on the job totalling over 50 years experience and we don't have a clue what it is for or were to fitt it in the system. We have 2 risers 1st is mains feeding 6 flats and the second is boated feeding the other 12. So I thought it would be a good idea to ask the knowledge base that is pluming forum.