Water pump July 02, 2016, 03:37:49 pm It looks like I am finally going to replace my water pump. I have a 2008 mid bath so have an old Shurflo Smart Sensor 5.7 water pump. Is the Revolution 2008 still suggested as a replacement? If not what are some other suggestions?Thanks for your help!Pam
Re: Water pump Reply #1 – July 02, 2016, 03:57:02 pm I am also in the process of exchanging my water pump (see post "Recalcitrant Water Pump").I will be removing the eleven year old Smart Sensor 5.7 (Extreme Series) due to failure. I could have purchased the 1048 which is said to be a direct replacement for the 5.7 but decided instead to go with the 4008-101-E65. I hope it's going to work but will not know until it's installed.Steve S.Lazy Bones & Cedar
Re: Water pump Reply #2 – July 02, 2016, 04:05:55 pm OOppps...My bad, that should have been model 4048 (not 1048) as in my last post. It's hard to keep all these part numbers in one's head.Steve S.Lazy Bones & Cedar 1 Likes
Re: Water pump Reply #3 – July 04, 2016, 08:54:06 pm Shurflo is as good as any water pump. You can do as well, getting what ever is stocked and on-sale at any farm supply store. It's an electric motor spins an impeller folks - the technology has long since been settled. The problem with the variable flow Surflo was a "smart" circuit board. Keep it simple. The 4008 does the job. Ours has been spinning around for eight years without a glitch. More than enough output to shower and do dishes at the same time.We carry a spare pump, another 4008. And it serves a purpose. 1 Likes
Re: Water pump Reply #4 – July 05, 2016, 03:54:01 am The 4008 is what most install. It produces a 3 GPM output and has proven itself as long lasting pump.The 4048 is a higher output pump with a 4 GPM output. It's usage is less common in LDs. Carrying a spare is always a good idea.Larry 1 Likes
Re: Water pump Reply #5 – July 05, 2016, 02:32:20 pm Quote from: Don Malpas - July 04, 2016, 08:54:06 pmIt's an electric motor spins an impeller folks - the technology has long since been settled.I don't believe any of the shurflo pumps use an impeller. A system of cam-driven sequential diaphragms and check valves provide the force, which is why there is pulsation in the flow.Steve
Re: Water pump Reply #6 – July 05, 2016, 02:40:16 pm Correct. These are diaphragm pumps. But Don's main point remains true: the mechanics of RV water pumps have been pretty much standardized for many years. It seems to be the frills they add--flow sensors, electronic control boards and so on--that cause most of the problems.
Re: Water pump Reply #7 – July 05, 2016, 02:56:54 pm Quote from: Steve - July 05, 2016, 02:32:20 pmI don't believe any of the shurflo pumps use an impeller. A system of cam-driven sequential diaphragms and check valves provide the force, which is why there is pulsation in the flow.The commonly used RV water pumps are all axial diaphragms pumps. Their built-in check valves retrain the system's pressure, when the pump is not operating. Multiple diaphragms help smooth water flow.In our LDs you will normally find centrifugal, impeller-type pumps used in the engine's water pump, the fuel pumps , the windshield washer and, if you own one, in sewage macerators pumps.The variable speed pumps suffered from poor electronics and, in my experience, poor construction.I found several with internal leaks, either into the motor or between the pump housing and motor.Really learned to hate the variable speed pumps which is too bad since they are a good idea that never got the proper development.Years ago, the Whisper King was the go-to, reliable pump. Today the 4008 has taken its place.Larry
Re: Water pump Reply #8 – August 21, 2016, 03:11:52 pm Now that I've finally finished the replacement of my old intermittent Smart Sensor 5.7 with the newer 4008 everything is back to near normal. Had to adjust the pressure to keep the new pump from surging but that went well.In conjunction with all of that I noticed that the flow from the kitchen faucet was not as smooth as it had been in the past. When I disassembled the output filter pack I found extremely fine debris in the screens. That had to have come through the inline filter, located prior to the pump itself. Considering that the inline filter has very fine screens I was surprised that anything got through to the faucet. Live and learn!
Re: Water pump Reply #9 – August 21, 2016, 06:41:23 pm Quote from: Lazy Bones - August 21, 2016, 03:11:52 pmWhen I disassembled the output filter pack I found extremely fine debris in the screens. That had to have come through the inline filter, located prior to the pump itself. Considering that the inline filter has very fine screens I was surprised that anything got through to the faucet. Live and learn! Since water often sits in the system for awhile, hard water has time to mineralize out as deposits. What you found may have been dissolved when flowing through the filter, later precipitating out.Steve
Re: Water pump Reply #10 – August 21, 2016, 07:18:23 pm That does sound logical Steve! But this problem came on suddenly, just about the time the water pump started it's intermittent B.S. Could the two events be related? Debris in the fresh water tank causing both the pump and the faucet to go haywire???
Re: Water pump Reply #11 – August 21, 2016, 08:21:21 pm Quote from: Lazy Bones - August 21, 2016, 07:18:23 pmThat does sound logical Steve! But this problem came on suddenly, just about the time the water pump started it's intermittent B.S. Could the two events be related? Debris in the fresh water tank causing both the pump and the faucet to go haywire??? When I winterize, you would be surprised just how much crud gets blown out of the freshwater system and we rarely camp in the SW hard water areas. If you really want to clean out the lines,faucets, etc., use compressed air as if you were winterizing. Ed 1 Likes
Re: Water pump Reply #12 – September 18, 2016, 08:19:53 pm I have a 03 26.5 midbath, can anyone tell me where the waterpump is located?Thanks, Rodney
Re: Water pump Reply #13 – September 18, 2016, 09:28:19 pm Quote from: Killerbob - September 18, 2016, 08:19:53 pmI have a 03 26.5 midbath, can anyone tell me where the waterpump is located?Thanks, RodneyUnder the kitchen sink, at floor level, is a panel held on with tabs of Velcro. The pump is right behind there. Ed
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