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Steve Davis | profile | all galleries >> Projects >> Tankless Water Heater Installation, July 23, 2025 tree view | thumbnails | slideshow

Tankless Water Heater Installation, July 23, 2025

We'd been thinking about replacing our standard water heater with a tankless one for a while and finally took the dive. Our HVAC company, Edmond Heat and Air, sent out Christian and Trent to take care of business and got the old tank out and the new heater installed in less than a day.
Christian and Trent had the 11yo hot water tank and pan out of the house before I started taking photos.
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Christian and Trent had the 11yo hot water tank and pan out of the house before I started taking photos.

 The new tankless heater was larger than we expected, but fit easily into the old space. The black trough to catch any leakage or condensation is on the porch. They replaced the old hot and cold water lines with polyethylene (PEX) tubing.
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The new tankless heater was larger than we expected, but fit easily into the old space. The black trough to catch any leakage or condensation is on the porch. They replaced the old hot and cold water lines with polyethylene (PEX) tubing.

 They also replaced the metal vent tubing with PVC pipe.
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They also replaced the metal vent tubing with PVC pipe.

 The new and the old
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The new and the old
Christian installed 2x4 boards on the back wall of our water heater closet to mount the new heater.
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Christian installed 2"x4" boards on the back wall of our water heater closet to mount the new heater.

 The new unit mounted on the wall
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The new unit mounted on the wall

 Looking up and out. The new vent tubing needs more space around it. They pushed back the insulation in the flat roof space to make room for installing it.
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Looking up and out.
The new vent tubing needs more space around it. They pushed back the insulation in the flat roof space to make room for installing it.

 Looking down. The mounted tank before hooking up all the connections
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Looking down.
The mounted tank before hooking up all the connections
Work site
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Work site

 Trent, checking connections They installed a pressure valve (upper right, above heater cabinet) that will compensate for any water pressure changes coming in from the connection to the city water supply to prevent damage to the unit.
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Trent, checking connections
They installed a pressure valve (upper right, above heater cabinet) that will compensate for any water pressure changes coming in from the connection to the city water supply to prevent damage to the unit.

 Christian, making final adjustments to vent pipes going into the ceiling
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Christian, making final adjustments to vent pipes going into the ceiling

 Christian, explaining how they worked out the venting
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Christian, explaining how they worked out the venting
All installed After explaining to me what they had done, he patiently answered all Mary's questions as well.
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All installed
After explaining to me what they had done, he patiently answered all Mary's questions as well.

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