Water heater replacement calculator
A gas, electric or tankless water heater swapped in: the venting, the connectors, the expansion tank and pan, haul-away and the install.
An estimate of the materials a job takes, worked out in your browser: check it against the job, and against your local code where it matters. Nothing you type leaves this page.
Put in the job's numbers and choices, and the list below follows them.
What it takes
Worked out for Vent run 10 ft, Vent elbows 2 each, Water heater: 50 gal gas tank, Expansion tank: Yes, Drain pan: Yes.
The heater
- 50 gal gas water heater 1 each A fixed 1: 1 each.
- Thermal expansion tank, 2 gal 1 each A fixed 1: 1 each. Needed on a closed system in many places; check local code.
- Water heater drain pan 1 each A fixed 1: 1 each.
Venting
- Type B vent pipe, 3 in x 2 ft 5 each Vent run 10 ft at 2 a piece: 5 each.
- Type B vent elbow, 3 in 2 each Vent elbows 2 each: 2 each.
Left out: Tankless vent kit (only when Water heater is Tankless gas); Tankless vent extension, 3 ft (only when Water heater is Tankless gas).
Connections
- Water heater connectors, 18 in, pair 1 pair A fixed 1: 1 pair.
- Dielectric unions, pair 1 pair A fixed 1: 1 pair.
- Gas flex connector, 24 in 1 each A fixed 1: 1 each.
- Gas shutoff valve 1 each A fixed 1: 1 each.
- 3/4 in CPVC relief discharge pipe, 10 ft 1 each A fixed 1: 1 each.
- Thread sealant, solder and fittings 1 lot A fixed 1: 1 lot.
Left out: Water heater wiring whip and connectors (only when Water heater is 50 gal electric tank).
Labor
- Water heater haul-away 1 each A fixed 1: 1 each.
- Water heater installation 1 each A fixed 1: 1 each.
What it leaves out
- Permits and inspection fees
- A new gas line or electrical circuit
- Moving the heater
The same calculator in SMG Tools
In SMG Tools this calculator fills its numbers from the client's site measurements, prices every line from your own Price Book, checks the margin against your target, and carries the lines onto the proposal, the job's plan and the purchase order. It is one of the ready-made calculators SMG Tools sets up for plumbing, and calculators are on every plan.