BOOST TICKET MARGINS. 45-MINUTE ROUGH-IN. ZERO CALLBACKS.
ThermoDrain® drain-water heat recovery (DWHR) systems are engineered specifically for Canadian job-site realities, residential rough-ins, and emergency water heater change-outs. For standard 3" residential stacks, the TDX Series solvent-welds directly into ABS or PVC System 15 DWV stacks with factory-integrated hubs and pre-assembled 3/4" PEX ports—no torch soldering near wood joists. For 4" commercial and multi-family stacks, the TD442 installs using standard shielded mechanical couplings onto PVC, ABS, or cast-iron risers. Add high-margin hardware to every truck roll with zero electrical hookups, zero moving parts, and full CSA B55.1 / CSA B55.2 certified listing on the Natural Resources Canada (NRCan) registry.
Monetize Every Water Heater Change-Out & Basement Renovation
+$400 to $800 CAD Margin
Per truck roll / installation
When a customer calls with a failed water heater or complains that their family runs out of hot water after two morning showers, upsizing from a standard 40- or 60-gallon tank often triggers major roadblocks: 100A to 200A electrical service panel upgrades, larger breakers, or drilling new B-vent/direct-vent penetration holes through exterior brick. Adding a ThermoDrain solves their hot water shortage instantly while putting an extra $400 to $800 CAD in net profit on your invoice:
The 30-Second Customer Script:
"While your plumbing is drained down today, we can cut in a ThermoDrain on your main shower stack. In Canadian winters, incoming street water is nearly freezing at 4°C to 10°C, which empties your tank fast. ThermoDrain captures the heat pouring down the drain to pre-warm that incoming water to 25°C before it hits the tank. That gives you up to 3x more continuous hot water for back-to-back showers, cuts your hydro heating bill by 30% to 40%, has zero moving parts, and will outlast your next two water heaters."
Tankless Water Heaters
Preheating freezing Canadian winter groundwater cuts the required temperature rise (ΔT) in half, preventing automatic winter flow-rate throttling so multi-bath homes maintain full shower GPM flow even in January.
Heat Pump Water Heaters (Hybrid)
Cuts instantaneous shower demand by 30% to 50%, keeping the hybrid unit running in high-efficiency compressor mode and preventing 4,500W electric backup elements from engaging during morning peaks.
Standard Gas / Electric Tanks (40/60 Gal)
Delivers preheated water directly into the cold inlet dip tube, extending continuous shower duration up to 3x without replacing the tank, running new gas lines, or upgrading electrical service panels.
Field Documentation
Download Official Job-Site Installation Manuals (PDF)
Printable job-site PDF manuals featuring complete rough-in schematics, clearance specifications, and Canadian plumbing code references:
TDX Series Manual
ENG / FRE
Instruction manual for 3-inch TDX units with direct solvent-weld (ABS/PVC) sleeves and factory 3/4" PEX crimp ports.
TDH & Commercial TD Manual
Commercial / Multi-Family
Technical manual for 4-inch vertical stacks (TD442/TD460) and horizontal TDH models using heavy-duty No-Hub couplings.
Ontario Building Code
Legal Exemption to Upsize Shower Drains (OBC 7.4.9.1.(3))
Under OBC Article 7.4.9.1.(3), plumbers can connect a 1.5" or 2" dedicated shower drain into a 3" ThermoDrain TDX3350 (to achieve OBC SB-12's mandatory 42% efficiency) and reduce back down without violating standard "no reduction in direction of flow" rules.
Quebec & Vancouver Code Rule
Preheat Water Heater ONLY (Equal Flow Prohibited)
Under RBQ Chapitre III (CMMTQ) and Vancouver Building By-law (VBBL 2.6.1.12.(2)), preheated water must route exclusively to the cold water inlet of the water heater. Piped equal flow to shower mixing valves is prohibited to protect anti-scald cartridge calibration.
Plumber Model Sizing & Specification Table
Certified to CSA B55.1 / CSA B55.2 • 100% CAD$Match straight vertical pipe clearance on the main stack. Listed on the official federal Natural Resources Canada (NRCan) registry:
| Model (SKU) | Drain Size × Length | Min. Stack Clearance | Drain Connection | Potable Connection | Tested Efficiency | Head Loss @ 9.5 L/min |
|---|---|---|---|---|---|---|
| TDX3240B | 3.0" × 24.0" (610 mm) | 28.0" (711 mm) | Solvent Weld (ABS/PVC) | 3/4" PEX Crimp (F1807) | 33.59% | 1.3 psi (9.0 kPa) |
| TDX3350 | 3.0" × 35.0" (889 mm) | 39.0" (991 mm) | Solvent Weld (ABS/PVC) | 3/4" PEX Crimp (F1807) | 42.10% (OBC SB-12) | 1.9 psi (13.1 kPa) |
| TDX3615 | 3.0" × 61.5" (1562 mm) | 66.0" (1676 mm) | Solvent Weld (ABS/PVC) | 3/4" PEX Crimp (F1807) | 55.04% (Net Zero) | 2.4 psi (16.5 kPa) |
| TD442 | 4.0" × 42.0" (1067 mm) | 46.0" (1168 mm) | Shielded No-Hub Mechanical | 3/4" Sweat / NPT | 46.20% | 1.8 psi (12.4 kPa) |
| TD460 | 4.0" × 60.0" (1524 mm) | 64.0" (1625 mm) | Shielded No-Hub Mechanical | 3/4" Sweat / NPT | 55.30% | 2.2 psi (15.2 kPa) |
| TD472 | 4.0" × 72.0" (1828 mm) | 76.0" (1930 mm) | Shielded No-Hub Mechanical | 3/4" Sweat / NPT | 59.10% | 2.5 psi (17.2 kPa) |
Unités résidentielles de premier choix
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TDX Compact | TDX3240 (Efficacité de 33,59 %)
Prix habituel $248.64 CADPrix habituelPrix unitaire par -
Raccords d'eau potable en cuivre TD442B-DR (46,...
Prix habituel $939.96 CADPrix habituelPrix unitaire $939.96 par item
