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Adapter 3"-4"-6'' from CPVC-PVC-Polypro to Z-Vent Stainless Steel

by Z-Flex
Original price $50.66 - Original price $75.43
Original price
$50.66 - $75.43
Current price $50.66


Made in AmericaPVC, CPVC or PolyPro to Z-Vent Stainless Steel Special Vent Adapter

This is commonly used to adapt a Z-Vent pipe piece to a tankless water heater with a PVC, CPVC or Polypro vent opening.

Cross reference table

(OD = Outside Diameter
ID = Inside Diameter)

Z-Vent Z-Flex
Nova Flex
part number
Heatfab (SelKirk)
Saf-T Vent, EZ Seal,
Saf-T Vent SC
ProTech Systems
FasNSeal or
FasNSeal CVS
3.5" OD 3" ID to Z-Vent 3" 2SVSTTA03 9301PVC FSA-ULT3 or 300715
3.5" OD 3" ID to Z-Vent 4" 2SVSTTA04 9401PVC3 FSA-ULT3
4.5" OD 4" ID to Z-Vent 4" 2SVSTTA04.5 9401PVC FSA-ULT4 or 303631
6.5" OD 6" ID to Z-Vent 6" 2SVSTTA06 9601PVC FSA-ULT6 or F303759

The following heaters are compatible with the 2SVSTTA03:

Modine PTC55, PTC65, PTC85, PTC110, PTC135
Triangle Tube Prestige Solo 80, 110, 150, 175, 250
Lochinvar Knight WHN111, WHN156, WHN200, WHN286
NTI Trinity TS 80, TI 80-200, TFT 60-250, LX150, LX200, LX200WH
Weil-McLain Ultra 80-155 CT, WM97+ 70-155 CT, ECO 70-155, GV90+3/4/5/6, AquaBalance WMB-80, 120, 155

The following heaters are compatible with the 2SVSTTA04:

Lochinvar Knight WHN400
Triangle Tube Prestige Solo 299
NTI Trinity LX300, LX600, LX300W LXH600WH
Modine BTC215, BTC260, BTC310

The following heaters are compatible with the 2SVSTTA04.5:

Triangle Tube Prestige Solo 399
NTI Trinity TFT 300-399
Weil-McLain EVG 220-399, Ultra 230-399 CT

The following heaters are compatible with the 2SVSTTA06:

Lochinvar FTXL FTX725, 850(N, L), Armor AW(N, L)701, 801, Knight XL KB(N, L)701, 801
NTI Trinity LX700, LX800 & LX700WH, LX800WH

FYI, installation instructions for the Lochinvar Knight state, "Install adapter directly into the flue vent coupler connector. An approved high-temperature RTV silicone sealant MUST be used to make the joint between the flue vent and adapter."

• Vent material: AL29-4C stainless steel
• Certification: Tested to meet or exceed Underwriters Laboratories (UL) spec UL1738 and ULS636
• Approval: Cat II, III, IV venting
• Limited Lifetime Warranty


Z-Vent SVE Series IV Installation and Maintenance Instructions, 3" to 24", Single & Double Wall

Z-Vent Dimensional Specifications