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In-Drain Heating Cable for Drain Lines Under 2 in (IPHC-DMi)
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Overview
Compact Freeze Protection for Open-Access Drain Lines
YeloDeer IPHC-DMi is a compact self-regulating in-drain heating cable for compatible non-pressurized drain pipes under 2 in. Insert it through a suitable existing opening to protect freeze-prone sections from inside the drain. Its primary use is an open-access drain installation with a clear cable route and normal drainage.
Direct insertionUse a suitable accessible opening. Keep the drain non-pressurized and properly vented.
Self-regulating heatHeat output adjusts as the surrounding temperature changes.
3 W/ft or 5 W/ftChoose the output for the exposure, insulation and heat loss.
Factory-finished lengths3 W/ft up to 75 ft; 5 W/ft up to 50 ft. Do not cut to length.
Built for Small Drain Routes
The compact cable is approximately 0.31 × 0.19 in. (7.9 × 4.7 mm), with a corrosion-resistant fluoropolymer jacket and an approximately 6 ft power cord. It is intended for compatible shorter, lighter-duty drains where a clear internal route allows gentle insertion.
Where DMi Fits
Typical uses include compatible general drain lines, gray-water discharge, equipment drains, and HVAC or heating-system condensate drains exposed to freezing. An outdoor outlet, cold wall penetration or unheated utility area can be the section needing protection. Check the full route rather than only the visible pipe end.
Use only in non-pressurized drains. DMi is not for potable-water supply or pipes that can build pressure. It has no integrated GFCI; provide the required ground-fault protection. Keep the power connection outside the drain and protected from moisture.
Temperature Control
Self-regulating does not mean automatic shutoff: the cable remains energized while connected to power. For temperature-based on/off operation, use a compatible YeloDeer Pipe Heat Tape Thermostat Controller, sold separately, within its rated load.
Need a Sealed Cable Entry Instead?
If the drain needs a dedicated fitted entry, pair DMi with the matching DrainGuard entry kit. This is an optional installation route; the drain must still remain non-pressurized.
Use DMi through a suitable accessible opening in a compatible non-pressurized drain under 2 in. Check that the cable can follow the internal route without obstructing flow. The drain must maintain normal drainage and required venting.
General Drain Lines
Compatible non-pressurized drain runs exposed to freezing.
Compatible gray-water drain lines with a clear internal cable route.
Non-Pressurized DischargeClear Drainage Path
Equipment Drain Lines
Small equipment and appliance drains within the supported pipe sizes.
Ice MakersHumidifiersDehumidifiers
Condensate Drain Lines
HVAC and heating-system condensate drains are one common application.
Heat PumpsFurnacesBoilers & Water Heaters
Pipe Requirements
Recommended Pipe Size
Drain lines under 2 in, subject to the actual internal opening
Pressure Condition
Non-pressurized only; no water-pressure rating
Required Pipe Layout
Maintain normal non-pressurized drainage and required venting
Entry Method
Direct insertion through a suitable existing opening; keep the cable entry accessible and the drain non-pressurized.
Internal Route
Clear route without blockage, collapse, crushing, or sharp restrictive bends
Select the Right Product
Choose IPHC-DMiFor compatible non-pressurized drains under 2 in. with a suitable accessible opening. Choose the finished length and output, and provide required ground-fault protection.
Choose IPHC-DMaFor a 2 in or larger sewer or wastewater line, especially for continuous runs from 76 ft to 180 ft or when a built-in GFCI and heavier cable construction are preferred.
Choose DrainGuardFor a 1/2 or 3/4 in PVC/ABS drain when a standard 3 W/ft DGK cable length fits. Cable and small entry fittings are included together.
Do Not Use This Product For
Pressurized drinking-water lines or potable-water supply pipes
Closed or sealed pipes that can build pressure
Large sewer or septic pipes better suited to the heavy-duty IPHC-DMa
Blocked, collapsed, crushed, leaking, or unknown internal pipe routes
Routes that require the cable to be forced through sharp elbows or restrictions
Specifications
Technical Specifications
Model
IPHC-DMi
Product Type
Compact self-regulating in-drain heating cable without integrated GFCI
Primary Application
Compatible non-pressurized general drain lines, gray-water discharge, equipment drains and condensate drains
Heating Output
3W/ft or 5W/ft at 50°F / 10°C, depending on selected variant
Voltage
120V AC
Cable Type
Self-regulating heating cable
Outer Jacket
Corrosion-resistant fluoropolymer jacket
Cable Size
Approx. 0.31 × 0.19 in / 7.9 × 4.7 mm
Power Cord Length
Approx. 6 ft
Plug Protection
No integrated GFCI; provide required circuit and ground-fault protection
Minimum Bend Radius
1 in at 32°F / 0°C
Maximum Stable Cable Temperature
140°F / 60°C
Recommended Pipe Size
Compatible non-pressurized drain lines under 2 in
Water-Pressure Rating
None; for non-pressurized drain applications only
Required Pipe Layout
Maintain normal non-pressurized drainage and required venting
Standard Lengths
3 W/ft: 5–75 ft; 5 W/ft: 5–50 ft. Select an available finished length.
Custom Lengths
Available by request
Field Cutting
Not allowed
Choose 3W/ft or 5W/ft
3W/ft Standard OutputFor compatible drain installations with lower heat loss. Check exposure, insulation and the required heated length.
5W/ft Higher OutputFor colder exposure, longer outdoor sections, or drain routes with greater heat loss.
Select the Correct Length
Measure from the planned cable-entry point to the farthest freeze-prone section. Include hidden cold-wall and outdoor sections when known. Do not choose a length that requires sharp coiling inside the pipe.
Do not cut, shorten, splice, or modify the heating cable. Select the correct finished length and heating output before ordering.
Installation
Direct-Insertion Installation
Use the installation instructions supplied with the DMi cable for the complete electrical and routing requirements. The steps below summarize installation through a suitable existing drain opening.
Keep the cable unplugged. Confirm the drain is non-pressurized, correctly vented and compatible with DMi.
Thaw or clear an existing blockage and restore normal drainage before installation. Inspect for damaged pipe and sharp edges.
Measure the intended route and confirm the finished cable length and output before insertion.
Insert the cable gently through the accessible opening toward the section needing freeze protection. Do not force it through bends or obstructions.
Keep the jacket free from scraping, crushing and tight kinks. Do not cut or splice the heating cable.
Check that the cable position does not obstruct drainage or required venting. Keep the power connection dry and outside the pipe.
Provide the required grounding, overcurrent and ground-fault protection, then connect power in accordance with the cable instructions.
Clear the route firstDo not push the cable through ice, debris or an unknown obstruction.
Use gentle hand pressureStop when resistance increases; inspect the route.
Keep drainage openDo not block normal flow or required venting.
Protect the electrical connectionDMi has no integrated GFCI plug.
FAQ
Do I need entry fittings for an open-access drain?
No separate entry kit is needed when the drain has a suitable accessible opening for direct cable insertion. The route must remain clear, non-pressurized and properly vented. If a dedicated fitted entry is required, see the optional DrainGuard route at the end of Overview.
Does this version include a GFCI plug?
No. IPHC-DMi does not include an integrated GFCI. Provide the grounding, circuit protection, and ground-fault protection required for the installation and applicable electrical requirements.
Is this cable pressure rated?
No. It has no water-pressure rating and is intended only for non-pressurized condensate and drain lines. Do not use it in pressurized plumbing or potable-water supply pipes.
What is the difference between 3W/ft and 5W/ft?
The 3W/ft version is the standard-output option for compatible small drain applications. The 5W/ft version provides higher heat output for colder exposure, longer outdoor sections, or greater heat loss.
Can this cable be used for sewer or septic lines?
This compact model is for compatible non-pressurized drain lines under 2 in., including general drainage, gray-water, equipment and condensate drains. Choose an available finished length within the selected output range. For larger, longer, or more demanding sewer, septic, and wastewater pipes, choose the heavier IPHC-DMa with integrated GFCI and continuous lengths up to 180 ft.
Does the cable turn itself off?
No. Self-regulating cable reduces heat output as temperature rises but remains energized. Use the compatible YeloDeer pipe heat tape thermostat controller for automatic on/off control.
Can it operate in a dry or temporarily empty drain?
Yes, when installed in a suitable non-pressurized drain route. All electrical, pipe-layout, and installation requirements still apply.
Can I cut the cable to length?
No. Measure the route before ordering and select the correct finished length. Contact YeloDeer for a custom-length project.
Guides
Choosing and Using DMi in an Open-Access Drain
Use this guide to check the drain route, heating length and output before selecting an IPHC-DMi cable. It covers compatible non-pressurized general drainage, gray-water, equipment and condensate lines under 2 in.
1. Start with the Accessible Opening
Choose a suitable existing opening from which the cable can follow the drain toward the freeze-prone section. Check the actual internal clearance, bends and access for inspection. Nominal pipe size alone does not establish that the route is suitable.
A sharp elbow, damaged joint or restricted opening can stop insertion. Do not use force to make a cable follow an unsuitable route. Keep the normal drain path and required venting open.
2. Measure the Full Freeze-Prone Route
Measure along the intended cable route from the opening to the farthest section needing protection. Include cold wall penetrations, unheated utility spaces and exposed outdoor pipe where applicable. Measuring only the visible outlet may miss another vulnerable section.
Select an available factory-finished length. DMi cannot be cut, shortened or spliced in the field. Do not force surplus cable into a restricted space; follow the supplied instructions for any remaining cable outside the drain.
3. Choose 3 W/ft or 5 W/ft
Option
Listed length range
Selection basis
3 W/ft
5–75 ft
Standard output for compatible installations with lower heat loss.
5 W/ft
5–50 ft
Higher output for installations with greater heat loss.
Output is rated at 50°F / 10°C. Exposure, insulation and drain layout affect the required output; pipe diameter alone is not enough. Check current availability in the selector.
4. Restore Drainage Before Installation
Clear ice or debris and inspect a frozen line for damage before inserting the heating cable. DMi is intended for freeze protection in a suitable drain route, not for forcing a path through a blockage.
Confirm compatibility with the pipe material, drain contents and operating conditions. General drainage and gray-water lines require the same route and clearance checks as equipment or HVAC condensate drains.
5. Provide Electrical Protection and Control
The 120 V cable has no integrated GFCI plug. Provide the grounding, overcurrent and ground-fault protection required for the installation. Keep the power connection outside the drain and protected from moisture.
Self-regulating cable changes heat output with temperature; it does not automatically disconnect power. A compatible thermostat controller can provide temperature-based on/off operation within its load rating.
6. Check the Installation Before Cold Weather
Inspect the accessible cable and power connection for damage, check that the drain flows normally, and verify that the cable has not shifted into a position that restricts flow. Keep the opening accessible for inspection.
If freezing returns, check power, protection devices, drain blockage and whether the selected length covers the complete cold section. Do not energize a damaged cable. Contact YeloDeer with the pipe size, cable length, installation photos and operating conditions for help.
I needed an option to keep an underground gutter drain from freezing. This product had everything I was looking for. It turned out to be of higher quality than I expected. It was easy to install and works perfectly. It's great that it's available in different lengths so that you can order the one closest to your application.
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