Do you see a difference between 310s and 310?Sure, if you really, really like working on pumps, because you'll be doing it much more often.
The Cat 310S has stainless steel inserts installed at the factory, that’s the only difference.Do you see a difference between 310s and 310?
What model are you using?I had a lot of skepticism when I decided to try the General Emperor pump. Well 10 years later, it's been proven to be great.
That's because they're cheap. They hold up pretty well on units fed with pressure and have the water heated after the pump, but they just don't last with gravity-fed hot water. They're also very prone to cracked plungers and oil leaks.General Pumps seem very good. Those pumps used mostly on commercial pressure washing units.