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Old 10-21-2009, 07:13 PM
sloman2001 sloman2001 is offline
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Default Water Pump ByPass 318SAB Cougar

Just picked up a new 10 Cougar 318SAB. Just now familiarizing myself with it. Mostly done, but did note that the unit lacks a water pump bypass valve. This makes winterizing more difficult. I plan to install a bypass valve, but the waterline hose diameter that runs from the pump to the fresh water tank, appears to be a larger type hose than the other plumbing. Has anyone installed a bypass valve in this larger type piping?

I can't believe that Keystone would leave out this bypass valve. Shame on them.
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Old 10-21-2009, 08:00 PM
Festus2 Festus2 is online now
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First, welcome to the Forum. Second, are you looking in the right place for the bypass valve? I assume you are talking about the valve that isolates your HW tank from the rest of your fresh water system so that you don't end up filling your HW tank with RV plumbing antifreeze.
On my Cougar and I would assume on all recently-built Keystone RV's, a bypass valve has been installed and, in my case, it is not near the water pump. I believe most of these valves are in close proximity to your HW tank. Mine is more or less in a direct line with it - but on the inside of course. There is a panel - held there by 4 screws - that I remove and the valve is right behind this panel. Turn it to the upright/vertical position and your HW tank is then isolated.
Somehow, I can't imagine an RV built today that is lacking this valve or valves. (Some RV's have more than one). If, after you have tried tracking it down and a conducting a thorough search, it still can't be found, then you might try asking for some assistance on this forum. Again, I don't think that you need to install one - it is there - somewhere.
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Old 10-22-2009, 02:54 AM
Terrydactile Terrydactile is offline
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Are you talking about a valve in that line so you can choose to suck antifreeze out of a jug instead of the fresh tank? If so my Keystone does not have one either. I just disconnect the fresh hose and stick it in the jug. I really should install a valve.
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Old 10-22-2009, 06:13 AM
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hankpage hankpage is offline
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Winterizing valves that connect to the inlet side of the water pump are not standard equipment but are inexpensive and easy to install and available at CW and all RV dealers. The WH bypass is standard on most trailers and is generally located in the fittings on the side of the heater itself. Hope this helps, Hank
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Old 10-22-2009, 06:28 AM
Festus2 Festus2 is online now
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As Hankpage pointed out, these "winterizing valves on the inlet side of the pump" are not usually found in RV's and you can buy kits that are easily installed. From your post, I wasn't quite sure which valves you were referring to. Keystone is not alone in not providing them as standard equipment.
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Old 10-22-2009, 03:16 PM
sloman2001 sloman2001 is offline
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Thanks for the replies. Just for clarification, I do have a bypass valve for the WH. I can see it when I remove the screws for the access panel. Yes, this is probably standard. I had one on my last rig. But this is not what I was inquiring about. I was asking about a bypass valve from the water pump to the fresh water tank.

What I didn't realize is that a bypass valve from the water pump to the fresh water tank, allowing you to "suck in" anti-freeze instead of fresh water, was not standard. That is the bypass valve I was originally inquiring about.

I can install a bypass valve there, my problem is getting one really. The outside diameter (OD) of the fresh water hose in my rig is 3/4" as opposed to the normal 5/8" OD. I just picked up a regular bypass valve today, but it doesn't fit because it is for a 5/8 OD. I need to find a different sized one. I guess I'll have to go to the dealer.

For what ever reason the 2010 Cougar (not sure of other years) uses larger diameter piping (3/4" OD) for the fresh water supply ONLY. In all other areas, it uses a 5/8 OD. The fresh water pipe is a plastic re-inforced pipe, not sure why.

IMO, this bypass valve really should be a standard.
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Old 10-24-2009, 01:34 PM
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hankpage hankpage is offline
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Quote:
Originally Posted by sloman2001 View Post

IMO, this bypass valve really should be a standard.

People who live and camp in warm climates don't have to winterize and many people prefer to use low point drains and blow out lines. I have installed these valves in all my trailers and the kits came with fittings for all size hoses. The only use for this valve is to pump antifreeze into the fresh water system. If you purchase a kit for RV use it should have the correct fittings for different brand pumps and hose sizes. This has been my experience anyway.
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Old 10-24-2009, 09:21 PM
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The problem with winterizing is that you have to completely purge all water lines and pipes of all water or suffer the consequences. I have used the air pressure blowout method in the past, but that doesn't purge the water in the pump and pressure dome (an add-on I installed).

In addition there is the water left in the "P" traps on all of your drains and don't forget the outside shower. What about the ice maker if you have one or your water filter. You must drain the water heater and if installing antifreeze switch the bypass valve so that you don't waste antifreeze by filling up the WH.

You get the point, it is hard to be 100% sure that you have removed or replaced with antifreeze all of the possible freeze points on your coach.

PLEASE BELIEVE that you must be diligent in doing this process because if you miss something, it can be devastating and costly.

If you need further advice or guidance please ask!!
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Old 10-24-2009, 09:50 PM
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Yes, I have had a few close calls..... leaving it too late for one but was fortunate enough not to have suffered the consequences. Prior to getting our Cougar in '08, we had never had any exterior taps - washdowns so the winterizing was an interior job. Last winter, I almost forgot about the outside taps and just caught that in time before things turned bitterly cold. Also have to ensure the toilet flap/seal is coated with antifreeze as it normally is coated with water.
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Old 10-25-2009, 06:49 AM
Steersall4 Steersall4 is offline
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My 04 cougar (285efs) has factory installed BOTH the one for the water heater is on the cold water 'IN' line. I can't imagine bypass's not installed in recent years either. I know several with keystone products have them too!
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