It is quite possible (and it has happened to mine after changing the water heater) to have a pocket of air on the glycol side that prevents circulation of the glycol. To solve this, remove one end of the hose and fill it with the glycol/water solution and then re-attach the hose. At this point it shoul re-establish flow.
Bob Bob Boyer s/v Rainy Days C&C Landfall 38 (Hull # 230) (Presently in Baltimore for the summer) blog: dainyrays.blogspot.com email: dainyr...@icloud.com > On May 16, 2019, at 9:51 PM, Len Mitchell via CnC-List > <cnc-list@cnc-list.com> wrote: > > Bruce, the engine loop inside the water heater is usually copper with no > check valves so it should not matter how it’s connected, it’s just a loop. > You can tell which hose is the supply with the engine running, it’s going to > be the warmest one. The little bit of air inside the loop will be removed by > the engine in its normal cycle and coolant will be drawn back in from your > coolant reservoir. The air inside the tank will come out the hot side of a > faucet. I avoid bleeding air using the pressure temperature relief valve > because they are notorious for dripping after you do, probably less of a risk > at boat pressure compared to household pressure. If it does it’s usually made > by Watts and they aren’t too expensive or hard to replace with a small pipe > wrench. You haven’t said why you suspect air but if it’s been disconnected a > while the engine inlet or outlet can become plugged and not circulate. Best > way to tell is if you have warm water circulating through both hoses with the > engine running. > Len Mitchell > Crazy Legs > 1989 37+ > Midland On. > > Sent from my iPad > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
