Hi, I have an above ground pool that arrived with a solar heater. I want to install the solar heater on a shed roof. The pool and pump have threaded connectors (I think they are European 40mm size) and I need to convert them to 1-1/2" PVC pipes. It seems like I can't find a single piece adapter, so I have to assemble few pieces together. These pieces have different internal diameter, and for some, it is smaller than the internal diameter of a 1-1/2" PVC schedule 40. Is it ok to use fittings with smaller internal diameter? Will it affect the flow in the entire pipe, or is it just going to change the flow rate/pressure in that section, but the rate/pressure in the rest of the (1-1/2") pipe will remain the same? Thanks, Joe.

[img]https://cimg0.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1923/plumging_tool_3_1971eddb251ae543811fef554f2b34e2a7c2fdb7.jpg[/img] [i]Tool I made to retrieve a toothbrush from the toilet. 10 foot 5/8" outside diameter plastic tubing with five, 5 inch long strips cut at the end and each wrapped in TUCK tape for rigidity. Strips are flipped back on the tube and secured with TUCK tape to form hooks. Insert the tubing into the toilet and pull back to hook the toothbrush.[/i] A super big thanks to the person who posted a DIY fix several years ago on this forum to use a balloon at the end of a length of plastic tubing to fish out a toothbrush in the toilet. Unfortunately it did not work for me but I used the plastic tubing idea and modified the end with hooks. A professional plumber in Richmond, B.C., Canada charged me $51.00 for the call out, quoted me $384.00 for him to attempt to retrieve the toothbrush with no guarantee and not responsible if the toilet gets damaged. The 10 foot tubing ( I really only needed 5 foot but it came in a 10 foot length) cost me under $9.00 at Home Depot.