This is a black 82mm open back strap boss, designed for use with soil pipe installations. Manufactured from PVC, it is suited for joining branch waste pipes into an existing soil stack where access to the back of the pipe is restricted.
On site, this fitting is commonly used in residential and commercial plumbing projects when additional entries are needed on a soil pipe. The open back design allows for straightforward installation without dismantling the entire stack, saving time during modification or repair work.
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