TLDR: New home build (NW Indiana). Using Champion 201176 (9000W start / 5875W running on NG) with interlock. Grill stub is 16 ft of 1/2" pipe +2 elbows, (from 1" pipe to the meter) in the unfinished basement ceiling, so easy access. Plumber quoted $500 to upsize the 16 ft of 1/2" pipe to 3/4" pipe. I want full NG output for essentials + ideally one AC (with soft start). Is the current 1/2" pipe sufficient, or should I upgrade? Is $500 fair? Also future-proofing for a bigger gen later.
Long version: Building a new construction home (Northwest Indiana) and having an interlock kit installed so I can run my Champion 201176 Tri-Fuel open-frame inverter generator on natural gas during outages.
Generator specs (NG): 9000W starting / 5875W running. Manual lists minimum flow rate of 135,000 BTU/hr and requires 5–7" WC supply pressure. Champion also sells a 3/4" NG hose and states that the 3/4" diameter “delivers full natural gas flow, so the hose never restricts your unit’s output on natural gas,” which makes me think the stock smaller 1/2" hose that came with my gen is limiting, as I've also read from folks in a similar situation.
What I want to run: Main essentials (2 energy star fridges, some lights, chargers, wifi, sump pump, etc.) plus ideally one of my two central ACs (2-ton and 2.5-ton) with an Airgo soft-start installed. I know I can’t run both ACs and that even one will be pushing the NG continuous rating, but I’d like the option.
Current gas piping:
- 1" pipe comes in from the meter, then splits to various 1/2" branches (stove, water heater, two furnaces, fireplace, dryer)
- Grill hookup on the back patio is fed by 16 feet of 1/2" pipe with 2 elbows. This run is in the ceiling of the unfinished basement, so it’s fully accessible (not buried or inside finished walls). I plan to connect the generator there.
- I will also use a ~30 ft hose (planning to upgrade from the stock 1/2" one to a 3/4" hose).
Plumber quoted $500 to replace that last 16 ft of 1/2" pipe with 3/4" pipe. Given the easy access in the unfinished basement ceiling, I’m leaning toward doing it. Everything I’ve read suggests the 16' with 2 elbows of 1/2" pipe + 1/2" hose combination will not deliver the full 135k BTU/hr needed for max NG output on this generator (especially with the elbows and long hose). It would also future-proof the line if I ever upgrade to a larger generator down the road.
Questions:
- With 16 ft of 1/2" (2 elbows) + ~30 ft of hose, will I realistically get full NG wattage from the 201176, or is the upgrade to 3/4" pipe necessary to avoid restriction?
- Does $500 seem reasonable for this work in Northwest Indiana (easy access in unfinished basement ceiling)?
- Any other gotchas I should watch for (gas meter capacity, pressure drop, etc.) when using a grill stub for this generator?
Appreciate any real world experience with this generator or similar setups on NG.