[hypoxia]

My experience with macerating toilets, two Headhunter Royal Flush in current coach and two Thetford Tecma in the last coach. Royal flush work well with the Headhunter Mach 5 120VAC water pump but the standby 12VDC Pentair Shurflo 4008 water pump barely puts enough pressure even when the pump pressure is adjusted for max pressure. The Royal flush advertises the capability of flushing rags etc.. I think I would rather unclog a toilet than a holding tank. The Royal Flush also uses a lot of water. It has an adjustment for the number of flushes and length of flush. It seems to use at least a gallon per flush. It has a flush valve located on the inlet water line which is what controls the number and length of flush. There is an inlet screen on that valve which can get clogged and cause problems. There is supposed to be an inline strainer at the water pump inlet but mine does not have one.

The Tecma toilets have a macerating pump built in, they work well with a 12VDC RV water pump. If you flush bad things it can clog the macerator pump but they are easily removed, disassembled and cleaned. I took one apart for a friend that had two car keys in it. The water volume in the toilet is adjustable and can be drained for storage by pushing two buttons. It uses around 0.8 gallons of water per flush if I remember correctly. It requires sensors mounted on the black tank to avoid overfilling the black tank. In 7 or 8 years I replaced one controller, they were reliable.