Installing an AO Smith gdv40 - their non-power vented direct vent water heater- and finding that their tech support seems to not have any knowledge. The manual allows for two 90’s- one from the vertical off the top of the unit to horizontal, and a second if there’s a need for an off-set exit horizontally out the wall. I have an installation option that would require a 45 from the vertical off the top of the unit, a second 45 shortly after back to vertical, and then the 90 out the wall... AO Smith Direct vent venting question ..read more

Hello Everyone, I'm seeking assistance in identifying the part number for a SYMMONS TEMP CONTROL mixing valve installed around 2010. Despite examining the unit closely, I'm unable to find the part number. The label "TEMP CONTROL" is visible on the front left side. Could someone help identify the part number based on the attached photos? Thank you in advance for your expertise ..read more

Hi all, I have a 3 speed blower for my furnace, only the black high speed has continuity. The yellow and red do not. I wanted to do a summer switch and have the blower on low during the summer. I have never had a problem with the furnace. Is it normal to have continuity for only one speed? Its a Lennox G20(draft furnace has no inducer) I think the capacitor is blown as jumping out the fan makes the fan only hum and not spin. Power is getting to the blower from the board. When I removed the... 3 speed blower 1 phase ..read more

So in the winter we do a lot of servicing water heaters because things slow down and my boss tries to book all his water heater services in the slow months. it seems here in missouri almost every one has an electric water heater and pounds of calcium built up. The draining process takes from 30 to 45 minutes and then I can finally do work but I am tired of standing around for 45 minutes. is there a faster way to drain an electric water heater? also our servicing is just me with a shop vac... electric water heater servicing ..read more

I was called to an older gentleman's house to clear his kitchen sink drain line stoppage. As I am setting up in his kitchen with my equipment the customer starts to tell me a story. He and his wife now reside in my state of Florida as retirees but he is originally from Minneapolis, MN. He tells me that years ago he worked for Amoco Oil up in Minneapolis. They had a fleet of trucks and delivered fuel oil to customers' homes for the oil-fired boilers that are in the basements. So... Oil Tank In Basement ..read more

I have had 3 technicians over to look at my boiler system to try an repair this intermittent problem I have been having where when the system tries to fire up it doesn't seem to ignite on the first or even second, third, etc light. It sounds violent and shakes the entire house. This morning we woke up to no heat.one tech said we needed a new relief valve and expansion tank and replaced those. Another tech made some "air adjustments". Nothing they did fixed the problem. The techs suggested it... Boiler system Help ..read more

This boiler system is probably about 50 years old? Hanging about the boiler is this tank. Supply in the top, return is at the bottom. It is sloped to the left. What is it for? Is it a recirc ..read more

I'm installing a Navien NCB-H combi-boiler later this month, and picked up the manifold kit from Ferguson this morning to prepare the necessary parts for installation. The manifold itself is fabricated from stainless steel and has dielectric unions for the connections to the boiler and the building plumbing. The union nuts appear to be bronze and rubber isolation gaskets are included. What's strange is that the tail pieces appear to be stainless steel, not brass. I've called Navien technical... Dielectric unions for Navien residential combi-boiler ..read more

Hey guys was wondering if anyone has some maintenance check lists for standard appliances ie. (furnace, Water heater, boilers) that they would be willing to share with me I am working on the process of getting my business licensed on the fuel side and liability is a huge factor with the gas stuff so having a check list of what you checked when you were on site and recording everything with pictures is key. thanks in advance guys ..read more

Can someone help me understand the function and application of these devices? I helped with an "apollo" (side loop for the HVAC) style heater and it failed inspection due to not having a vacuum relief valve on the side loop inlet (lower). Heater was located on first floor laundry closet of 2 story condo, city water, prv, etc. It's my understanding that the vacuum relief valve prevents back siphonage if the main is shut off and somebody tries to run water, but the domestic side of the... Water heaters and vacuum relief and anti siphon valve/s ..read more