use threading pipes were ever you can so when you need to do some work you can re-use the piping ... esp on the bulk head side..... ball valves on the pump and unions on them also remember ur suppose to lube ur pump i think once a year or something like that ... use primer and glue when doing the pvc


i would also more than likely use the iwaki if it was the correct GPH that ur looking for ... lot of people like how "smooth" they run