I also took out the water pump that came with our 5th wheel and put a better one in and did all that you did, the problem is that the pump vibrates the floor so I made rubber washers 1 inch tall on all four mounts, that made the whole pump 1 inch taller, I can hardly hear the pump now, you really have to listen to hear the pump, quiet is the name of the game.

Lonney 

Hi, I removed the bolts to the pump put a rubber mouse pad under the pump an replaced the bolts.

Look for places where water lines attached to the pump may be in contact with and vibrating on the wall or floor area.  That was the source of noise with our pump and once I insulated those areas with foam it stopped the "buzz".

Lots of good comments here. I thought about getting a new higher pressure pump, but now reading bjoyces' comment about conservation I won't, he just saved me $150.00. Bill, I guess I owe you lunch, thanks.

Red

Recently our Shurflo 2.8 broke and we were unable to get a replacement. We replaced it with a Shurflo 3.0, which still makes noise but is not as loud and might not be as annoying as the common 2.8. The model that reduced the number of days our friends could dry camp was the Extreme 5.7 (though I think it was 5.6 in those days). I am sure that some careful effort to control shower water flow would gain at least some of those days back. Our friends were not heavy boondockers and they lived with the change, mostly they were happy to have the increased water flow. Heavy boondockers take sponge baths and use other tricks to make their tanks stretch as much as possible.