rmcderm313
New Member
Hi All,
I've got a leaking circulator pump on my boiler. It appears that the gasket has failed and the exposure has done some damage to the flange and possibly the pump housing as well. I'm certainly no plumber but I'm pretty handy, so I'm going to try and replace this myself.
Here is a link to photos of the setup.
https://photos.app.goo.gl/i43BN4ZNePdpaZBD9
My system is forced hot water. There are two other zone pumps that are away from this pump. These do have shutoff valves that I can close in case the heat system would drain back down through the boiler. I'm not sure if it would be I can close those.
I believe that the pump in question is the main hot water circulator which both pumps to heat the external hot water tank as well as pumps hot water on demand to the whole house. There is a shutoff between the hot water tank and the pump, so that's good to isolate it. My question is what is the best way to isolate this pump from the rest of the hot water pipes through the house, or whether I just need to drain the whole upstream system of hot water before replacing this.
After the pump there is an expansion tank, and then after that there is what looks to me to be a shut-off valve. Can I use this to isolate the pump? The are a few picture of this in the album, black with a square set screw (not sure what it's called).
I'm certainly going to replace the gasket and flange based on low price alone. The pump is $88 and looks to be in good shape. Not to mention I'd rather not get into re-wiring a new pump. What are your thoughts on whether the slight damage to the pump housing would compromise the seal. I think it's just the paint and very outside of the pump that has some corrosion.
Any advice is appreciated, both specifically to these questions as well as overall advice on how to go about this and things to watch out for. I know to turn off the electricity to the system and allow the hot water to cool before starting.
Here are some links to the specific parts involved from HD. Is it safe to assume that these gasket and flange kits are the right size or do I need to measure my installation specifically?
https://www.homedepot.com/p/1-25-HP-Cast-Iron-Circulator-Pump-007F5/205741246
https://www.homedepot.com/p/Rubber-Gaskets-2-Pack-BP396/202277432
https://www.homedepot.com/p/Plumbers-Edge-3-4-in-Flange-2-Pack-PECF075/205892462
Thanks in advance. If I haven't included a good picture of something that would help I'll take more.
-Rob
I've got a leaking circulator pump on my boiler. It appears that the gasket has failed and the exposure has done some damage to the flange and possibly the pump housing as well. I'm certainly no plumber but I'm pretty handy, so I'm going to try and replace this myself.
Here is a link to photos of the setup.
https://photos.app.goo.gl/i43BN4ZNePdpaZBD9
My system is forced hot water. There are two other zone pumps that are away from this pump. These do have shutoff valves that I can close in case the heat system would drain back down through the boiler. I'm not sure if it would be I can close those.
I believe that the pump in question is the main hot water circulator which both pumps to heat the external hot water tank as well as pumps hot water on demand to the whole house. There is a shutoff between the hot water tank and the pump, so that's good to isolate it. My question is what is the best way to isolate this pump from the rest of the hot water pipes through the house, or whether I just need to drain the whole upstream system of hot water before replacing this.
After the pump there is an expansion tank, and then after that there is what looks to me to be a shut-off valve. Can I use this to isolate the pump? The are a few picture of this in the album, black with a square set screw (not sure what it's called).
I'm certainly going to replace the gasket and flange based on low price alone. The pump is $88 and looks to be in good shape. Not to mention I'd rather not get into re-wiring a new pump. What are your thoughts on whether the slight damage to the pump housing would compromise the seal. I think it's just the paint and very outside of the pump that has some corrosion.
Any advice is appreciated, both specifically to these questions as well as overall advice on how to go about this and things to watch out for. I know to turn off the electricity to the system and allow the hot water to cool before starting.
Here are some links to the specific parts involved from HD. Is it safe to assume that these gasket and flange kits are the right size or do I need to measure my installation specifically?
https://www.homedepot.com/p/1-25-HP-Cast-Iron-Circulator-Pump-007F5/205741246
https://www.homedepot.com/p/Rubber-Gaskets-2-Pack-BP396/202277432
https://www.homedepot.com/p/Plumbers-Edge-3-4-in-Flange-2-Pack-PECF075/205892462
Thanks in advance. If I haven't included a good picture of something that would help I'll take more.
-Rob
