About & methodology

What we include

• Only stops with an official or primary-source URL we opened, plus a date checked.
• Refill only when the official page lists tank refill, bulk propane, cylinder refill, or a fill station. Exchange only when the official page lists tank exchange. If a page only says “Propane / LP Gas,” we say the type is not specified.
• RV / ASME confirmed only when an official page for that chain or location clearly says it fills RVs or permanently mounted ASME tanks. Tractor Supply’s chain policy is quoted separately and still requires a call to the store.
• Prices and hours only as posted on the official page, with the check date. If a hours table did not fully render, we say so rather than guess the missing days.

What we do not do

• No invented listings, prices, hours, inventory, driveway measurements, or “RV fits here” claims.
• No phone verification on this first page (not yet performed). Call-ahead is always recommended, including at places with posted hours.
• No safety or fill-it-yourself instructions. Official pages we cite (U-Haul and Tractor Supply FAQs) describe inspections, expired cylinders, OPD valves, and requalification in their own words — read those sources.
• No affiliate links, no paid features, and no custom domain on this launch.
• Nationwide finder apps already exist (ProPath, Propane Patrol, RV Propane Finder, and others). This site aims at dated, city-level, source-quoted pages — not a live map clone.

Refill vs exchange (from official pages, not our math)

U-Haul’s propane FAQ (checked 2026-11-10) says refilling is a better value than exchange because exchange does not credit propane left in the tank, and that some U-Haul locations also offer exchange. Tractor Supply’s propane FAQ (checked 2026-11-10) says it charges only for gallons added, and that exchange cylinders are often filled to 15 lb of fuel instead of 20 lb. We do not invent a dollar savings for a typical BBQ tank.

RV and motorhome tanks

U-Haul says it fills 3-lb cylinders that have an OPD valve through 100-lb cylinders, and also fills permanently mounted ASME tanks on RVs, fleet vehicles, and autogas vehicles. It also says to call the location about what size RV can be managed on the lot.

Tractor Supply’s refill page says it does not refill autogas used to run an RV engine, but does refill tanks mounted beneath the RV if they have a propane data plate and pass inspection. A Tractor Supply FAQ says the majority of stores can fill RVs, to call ahead, and that a motor home or camper must be unoccupied during the refill. We still mark individual Tractor Supply stores as “call the store,” not as confirmed at that lot.

Love’s “Bulk Propane,” Pilot/Flying J “Bulk Propane,” and Camping World “Propane / LP Gas” are not treated as confirmed ASME motorhome fills unless the official page says so.

Negative findings (checked 2026-11-10)

• AmeriGas’s official Phoenix office page (908 South 27th Ave) states that walk-in service is no longer available and says “Please, no walk in traffic at this location.” It is not listed as a refill stop.
• Suburban Propane’s Phoenix page says that 85027 dispatch location is not open to the public. The retail location included in the directory is El Mirage.

Maintainable data

Listings live in data/phoenix-propane.json. Edit JSON, refresh the Phoenix page. Date-check fields are per source.

Local preview

cd /workspace/mogul-propane/site
python3 -m http.server 8766
# open http://127.0.0.1:8766/phoenix/

Opening HTML as a file:// URL may block fetch of the JSON in some browsers—use the local server.