OwenF Posted August 20 Share Posted August 20 (edited) Been wracking my brains on how to pipe this waste. Have a dishwasher between the sink and the stack. I want to use a standpipe for the dishwasher rather than the little appliance spigots. I only ever see the standpipes on the end of a run (probably for a reason). I understand I can't put a trap 'in series' with the sink, as the two will pull on each other. Can I do the below, having the standpipe on a parallel branch, then 'tees' (or more to point, Y and 45deg) into the main branch just before the stack? length of main branch is ~1.5m. The Y would be about 0.5m from the stack Edited August 20 by OwenF added lengths Link to comment Share on other sites More sharing options...
Conor Posted August 20 Share Posted August 20 Why aren't you putting the dishwater waste in to the sink trap? You can go a couple of metres with the outlet hoses. Link to comment Share on other sites More sharing options...
OwenF Posted August 20 Author Share Posted August 20 See above, don't want to use the appliance spigots on the sink trap. Reason: 1) want to avoid messy hoses in sink cupboard and 2) want to mitigate gurgling noise associated with them Link to comment Share on other sites More sharing options...
dpmiller Posted August 21 Share Posted August 21 put the DW drain hose straight onto a spigot on the branch. The DW is trapped in itself and the vented stack will ensure no gurgling. Link to comment Share on other sites More sharing options...
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