Iflyfish Posted October 26, 2021 Share Posted October 26, 2021 I need to winterize our 1987 Sunrader. In the past I have put anti-freeze in fresh water tank, turned off water heater intake valve and then just turn on pump till faucets run pink. I now considering putting a bypass valve on the water pump with a hose attached to winterize rather than drawing ant-freeze from the fresh water thank. Has anyone installed a bypass valve on their water pump with a hose attached to run rv anti-freeze thru your system? What do you do to add anti-freeze to your unit in the winter? Thanks Iflyfishinthedarksometimes Quote Link to comment Share on other sites More sharing options...
neilp Posted October 26, 2021 Share Posted October 26, 2021 As the winters are typically mild here in Central Texas to winterize I: - drain the water lines and freshwater tank using the drain valves and then close the valves - blow out the water lines with compressed air (at low pressure) with the taps and shower valves all open - add the pink anti-freeze stuff to each sink and the shower to protect the traps from freezing This has worked well and I had no problems even after the monster winter storm in March this year. A week of sub-zero temps and 6" of snow is beyond unusual here, and I was worried that my winterizing might be insufficient. No problems at all fortunately! Quote Link to comment Share on other sites More sharing options...
Maineah Posted October 26, 2021 Share Posted October 26, 2021 Yes I have a by pass on my pump. Drain all the tanks add compressed air to the hose input fitting maybe 40-50 psi (simple gadget old hose with a male fitting a hose clamp and an air fitting on the end) open one tap at a time till it blows the water out repeat. I tend to leave all the drains open just in case don't want to split open the the drain taps. Open the pump by pass suck up a few OZ to protect the pump call it good. Quote Link to comment Share on other sites More sharing options...
WME Posted October 26, 2021 Share Posted October 26, 2021 (edited) I have had this in place on all my RV's. I use 2 gal of anti freeze to do a 30 ft Class A. My RV sees -30 for several days a year and no problems. Bypass kit...https://www.pplmotorhomes.com/parts/rv-appliances/rv-water-heaters/water-heater-repair-parts/rv-water-heater-bypass_88-8824 Pump conversion kit...https://www.pplmotorhomes.com/parts/electrical-plumbing-lp-gas/rv-pumps-water-filters-fixtures/winterizing-by-pass-kits/rv-pump-converter_88-8893 You can blow out the lines with a compressor, as per Maineah. You can also use a shop vac in the blow mode to empty the p-traps. Then a half cup of anti-freeze per drain will be enough. Edited October 26, 2021 by WME Quote Link to comment Share on other sites More sharing options...
Iflyfish Posted October 27, 2021 Author Share Posted October 27, 2021 Thank you for all the great feedback! This is exactly what I needed. Iflyfishconmitoyamigos Quote Link to comment Share on other sites More sharing options...
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