SaniCompact 1-Piece 1.28/1 GPF Dual Flush Elongated Toilet in White with Built-In 0.3 HP 115-Volt Macerator Pump

A:  Elbows and all fittings for that matter, create resistance that absorbs and utilizes the force created by a pump. This occurs due to friction and a principle of fluid dynamics often referred to as swirl. I don’t think I am capable of explaining it well but if you are interested there are a lot of good YouTube videos that discuss it. Thoughtful plumbers will try to eliminate resistance. In my state, plumbing code requires that in certain applications you use two 45’s to form a long sweep rather than a 90. However I am not aware of any further appreciable improvement by using multiple 22’s or 11’s instead. I and every plumber I have ever known have only resorted to using fittings like 22’s and 11’s when the space required it. They are not fittings utilized to reduce resistance. They are used to get you out of an impossible situation. However if it makes you feel better I see no problem with it.

A:  No you cannot use an 11/2” discharge instead of a 1”. It needs to be 1” for two reasons. First the pump cycle is metered by time. The time cycle has been calibrated based on 1”. The additional water volume contained in 11/2” would conflict with the built in cycle time. Second the resulting water column created by using 11/2” instead of 1” would be roughly three times the weight. That weight would be sitting on a 1” check valve.

A:  If you scroll down the home depot product listing page you will come to a section entitled Product Details where you will find PDF’s of the product documents. If you open the Brochure it contains the answer to your question. The water connection is 3/8”. You would not run ½” PEX directly to that. That is not how toilets are installed residentially in the US. You need to have external shut off valve at the toilet. Typically a plumber would run a ½” PEX or copper water supply line to a ½” x 3/8” toilet supply valve. Then they would attach the 3/8” toilet supply to the 3/8” side of that valve. As to your other question the brochure indicates the limits to be 120’ of run and 9’ of vertical lift.

A:  The top of the stand pipe that recieves the sink drain is 11 1/2" up from the base of the toilet. That is a great quesiton. Thank You. We are makeing a specificaiton sheet and will add it to the product documents.