- This topic has 1 reply, 2 voices, and was last updated 23 years, 10 months ago by
SylvanLMP.
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MrsFixit
I would like to connect 3 four inch lines together before entering my septic tank. Can I use a double wye placed horizontally or should a double combination fitting be used?
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Rick, the longer radius fittings the better for uniform flow. I would also consider a clean out prior to any change of direction greater than a 45 Degree angle.
About connecting 3-4″ lines I would seriously consider increasing the pipe these three connect to a minimum of 6″ to make sure you can handle the volume if each pipe should be discharge near capacity.
My personal choice would be a 6×4 long turn double sanitary tee or a combination of a double wye and 1/8 th bend with a clean out on the run. This would allow for a smooth flow plus easy rodding just in case.As it is connecting 3- 4″ dia pipes to one 6 inch line is still slightly under sized but it should work BUT check your local code.
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