Raychem Frostex Self-Regulating Heating Cable (with Frostex 9800 FlexFit plug kit)
For the one pipe that freezes every winter, in a crawl space or an outside wall: a self-regulating cable that puts out more heat as the pipe gets colder, under the pipe's insulation.
By Raychem (Chemelex). Specs read from the maker on .
Price and stock: Maker product page (where to buy)
| Type | Self-regulating conductive core; output rises as the pipe gets colder |
|---|---|
| Listing | UL Listed mark (60J9, Residential and Mobile Home Pipe-Heating Cable) and CSA mark shown under Approvals on the maker data sheet |
| Voltage | 120 V |
| Output | 3 W/ft at 50°F |
| Minimum installation temperature | 0°F |
| Use on | Dry or weather-proofed, insulated, aboveground residential water pipes, metal or plastic, 1/2 in. to 2 in.; run straight along the pipe, not spiraled |
| Required plug kit | Each circuit needs a Frostex 9800 FlexFit kit: ground-fault protected plug (27 mA), 10 A fuse, end seal |
| Warranty | "2 year product warranty available" |
| Reel lengths / catalog numbers | Not stated by the maker |
"Not stated by the maker" means the maker's pages do not say; this shelf leaves it blank rather than guess.
Know before you buy
Sold as cable plus a separate 9800 FlexFit plug kit; the kit only works with braided Frostex cable, not older unbraided versions. Pipes must be insulated; the sizing table (lowest expected temperature 20°F to -40°F) sets how many straight runs you need. The listing appears as a logo on the data sheet, not in body text. Raychem residential products were formerly sold under nVent; the current maker site is chemelex.com. Maximum circuit length is 50 ft.
Where each spec was read
- Maker: Frostex data sheet RAYCHEM-DS-H57419 (rev 2504) read 2026-10-27
- Maker: Frostex product page read 2026-10-27
Read first
- How to keep pipes from freezingInsulate the pipes on outside walls and in unheated spaces, seal the drafts on them, and on the coldest nights let a faucet trickle and open the cabinets.
- What to do about a frozen or burst pipeShut off the water first. Then call a plumber and your insurance agent. Never use an open flame, and keep away from standing water near electricity.
Every store link on this shelf goes to the maker's own page unless a note beside it says it is an affiliate link. The guides on winterize.house name no brand; only these shelf pages do. No maker pays for placement.
Notes drafted with a language model from the maker's pages and checked against them. Product information, not professional advice: for gas, electrical and roof work, hire someone licensed.
Found an error? See Corrections.