A Pentair ETi 400 pool heater typically costs about $5,000-$7,500 for the unit and $7,000-$11,000 installed, depending on local labor and existing gas and electrical connections. The 400,000-BTU heater’s final price rises when a project needs a larger gas line, new venting, electrical work, removal, or permit updates.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| ETi 400 heater | $5,000 | $6,250 | $7,500 | Equipment only; dealer pricing varies |
| Standard installation | $2,000 | $3,000 | $4,000 | Assumes compatible utility connections |
| Installed total | $7,000 | $9,250 | $11,500 | Before unusual site upgrades |
| Replacement labor | $75/hr | $110/hr | $150/hr | Typical pool-equipment technician rates |
How Much Does a Pentair ETi 400 Cost Installed?
For a straightforward replacement, budget roughly $7,000-$9,500 for the ETi 400 and installation. A new installation or a job requiring gas-pipe, vent, or electrical upgrades can reach $9,500-$13,000 or more. The heater is a 400,000-BTU gas-fired unit; the quote depends on whether the site already meets its connection and clearance requirements.
Equipment prices can differ by dealer, availability, and whether the sale includes controls or delivery. The installed range assumes standard access, ordinary regional labor, and no major pool-plumbing changes. Assumptions: U.S. residential pool, standard installation, existing gas supply, and no major code corrections. For most replacement projects, the existing utility connections are the biggest reason the total stays near the lower end.
Where the ETi 400 Quote Goes During Installation
Installed quotes bundle the heater with removal, connection work, startup, and sometimes disposal. Ask whether quoted labor includes testing the gas pressure and confirming safe operation, rather than only setting the unit in place.
| Quote item | Typical price | What changes the charge |
|---|---|---|
| ETi 400 heater | $5,000-$7,500 | Dealer, inventory, included controls |
| Labor and startup | $800-$1,800 | Access, plumbing tie-ins, test time |
| Gas connection work | $300-$2,000 | Pipe size, route length, pressure test |
| Electrical and controls | $200-$900 | Wiring condition and control compatibility |
| Removal and disposal | $150-$500 | Old heater size and disposal requirements |
| Permit or inspection | $50-$400 | Local rules and inspection fees |
These charges are estimates, not fixed national rates, and some contractors combine connection costs into one labor line. A written quote should separate the heater, labor, gas work, electrical work, and old-unit disposal.
Gas-Line Length and 400,000-BTU Capacity Change the Quote
The ETi 400’s 400,000-BTU input makes gas capacity a major installation variable. If the existing line cannot deliver the required volume at the appliance, a contractor may need to increase pipe diameter or run a new line. A short, accessible branch line may cost a few hundred dollars; a 25-50-foot route through finished or hardscape areas can add $1,000-$3,000 or more.
Distance from the gas meter, other appliances operating on the same supply, and measured pressure all matter. Electrical capacity and control wiring also affect the estimate, particularly when the existing setup is old or incompatible. Local codes may require permits or corrections before startup. Have the installer verify gas pressure and pipe sizing before accepting a low equipment-only quote.
Installation Time and Crew Rates for a Pool Heater
A like-for-like replacement generally takes about 4-8 labor hours, often completed by one or two technicians. A new setup with gas-line work, control changes, or difficult access may require 1-2 days and multiple trades. At roughly $75-$150 per technician hour, added labor can materially change the bill.
For example, 10 hours at $110 per hour equals $1,100 in labor before materials, permit charges, or subcontractor fees. Scheduling may also depend on gas-pipe inspection or coordination with an electrician. Confirm whether the quote includes startup, pressure testing, and return visits for inspection.
ETi 400 Add-Ons That Can Push the Total Higher
Common extras include a new gas regulator, revised venting, plumbing fittings, automation integration, and equipment-pad changes. Allow about $100-$500 for minor fittings or adjustments, while a substantial gas-line reroute or electrical upgrade can add $1,000-$3,000 or more. Concrete, landscaping, or fencing repairs are usually quoted separately.
Old-heater removal and disposal may be included, but it is worth checking. A permit is not required everywhere, and fees vary by city and scope. If the quote includes a warranty or service plan, request the term, covered parts, exclusions, and price as separate line items. Ask for written approval before work begins if hidden site conditions could trigger change-order charges.
ETi 400 Versus Standard Gas Heaters on Upfront Price
A standard 400,000-BTU gas pool heater may cost less to buy, while the ETi 400 carries a higher equipment price because of its hybrid design and titanium heat exchanger. Comparable standard models can run about $2,500-$5,000 for equipment, with installed totals often around $4,000-$8,000 when connections are straightforward.
That difference does not establish which option costs less over time. Fuel prices, pool size, operating hours, climate, and desired water temperature affect ongoing expense. Compare equipment warranty terms and expected service needs alongside the initial quote, and confirm that alternatives meet the pool’s heating demand. Compare installed quotes for heaters with similar capacity and connection scope, not just their purchase prices.
Ways to Lower an ETi 400 Replacement Bill
Keeping compatible gas and electrical connections can avoid the largest upgrade expenses. Before requesting bids, provide photos of the heater pad, gas line, control panel, and equipment label; this helps contractors identify likely scope changes. Get at least two itemized estimates that specify equipment model, labor, removal, permits, startup, and exclusions.
Consider whether a repair is practical if the existing heater has a limited, diagnosable fault and is otherwise in sound condition. Compare repair cost with replacement price and warranty coverage rather than replacing solely because of age. Avoid paying for controls or accessories that do not match the pool’s system, and ask whether off-season scheduling changes labor availability or price. The clearest savings usually come from avoiding unnecessary utility upgrades and comparing equivalent, complete installation bids.