150mm DWV pipe has the same outer diameter (OD) as pressure pipe and stormwater therefore, there is no problem.
100mm DWV; we make a 100mm DWV valve specifically for this purpose.
80mm DWV; we recommend using a 100mm DWV push/pull valve with a 100mm x 80mm reducing adaptor.
50mm DWV; A piece of 50mm class 6 pipe used as an insert inside the valve will suitably adjust the bore to fit 50mm DWV.
Aussie Koi WA, designs and builds high quality fish ponds. We have been using OzValves for over 10 years and they have proven both cost effective and superior to other similar valves on the market. We have not had one complain and never changed a set of seals in this time. We also like the fact that it is possible to change the internals without cutting out the valve from the line, not that we have ever had to do this but this was the original attraction to the valve. Add to this good friendly reliable service; we have no hesitation in highly recommended them to others.