Answering the need for safe, efficient venting for tankless gas water heaters, this guide highlights five PVC vent termination kits that simplify installation and improve exterior aesthetics. Best for homeowners upgrading vent runs, contractors seeking quick installs, and DIYers aiming for clean, low-profile installations. The selections emphasize proper venting, compatibility with 2–3 inch pipes, and corrosion-resistant materials. Below is a quick table of the featured products to help you compare at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| DiversiTech HVENT2 | Low-profile installs | Conceals intake/exhaust for a tidy look |
| DiversiTech CVENT-3 | Concentric venting needs | Dual-pipe configuration for streamlined installs |
| ZNTVW SP20285 | Exterior-wall mounting | 2 inch PVC/ABS compatibility with wall-fit design |
| FMTDLOG 3″ Cap | 3″ systems | Stainless steel mesh and drainage features |
| Rheem RTG20280-1 ProTech | Stainless options | Complete wall plate and angled elbow included |
DiversiTech HVENT2 Horizontal Vent Termination Kit
The HVENT2 is designed to vent high-efficiency fossil-fuel appliances, with a low-profile design to conceal intake and exhaust piping. Best for installations where aesthetics matter and space is limited, it supports a tidy exterior appearance. This kit emphasizes proper venting to maintain safe, dependable operation for tankless water heaters and furnaces.
Who it’s best for: Homeowners seeking a discreet vent termination for 2-inch piping and professionals prioritizing clean exterior aesthetics.
Why chosen: Its low-profile, concealment capability reduces visible piping while maintaining proper vent performance.
Caution: Ensure your system is compatible with a horizontal 2-inch vent configuration; verify clearance to combustible materials on the exterior wall.
DiversiTech CVENT-3 3-Inch Concentric Kit
The CVENT-3 provides a 3-inch concentric vent solution, facilitating dual-pipe configurations that streamline installation for high-efficiency furnaces. Proper venting remains crucial to safe operation of tankless water heaters and other appliances. The kit’s design conceals both intake and exhaust pipes, helping create a tidy exterior finish.
Who it’s best for: Installers and homeowners planning a 3-inch concentric vent setup for exterior walls.
Why chosen: It offers a straightforward, aesthetically pleasing installation with dual-pipe capabilities.
Caution: Confirm you have a compatible 3-inch vent system and adequate clearance for concentric piping on the chosen wall.
ZNTVW SP20285 Horizontal Vent Termination Kit
Designed for 2-inch PVC/ABS piping with exterior-wall mounting, the SP20285 focuses on improving exterior aesthetics and ease of installation. Its 5.5-inch center-to-center spacing supports typical wall layouts, and the kit is paintable to better blend with your siding or brickwork.
Who it’s best for: Exterior-wall installations where a 2-inch vent is required and visual integration matters.
Why chosen: It combines practical venting with exterior curb appeal, suitable for homes needing a clean finish.
Caution: Double-check outer diameter compatibility and wall thickness requirements before ordering.
3 Inch PVC Vent Termination Cap
This 3-inch cap features a 304 stainless steel mesh screen to resist corrosion and debris while providing condensation drainage slots for moisture management. Built for high-efficiency furnaces, water heaters, and roof or sewer vent use, it emphasizes robust protection against clogs and weather exposure.
Who it’s best for: Roof or high-wall vent-term installs requiring extra debris protection and drainage.
Why chosen: The stainless screen and drainage design improve longevity in exposed environments.
Caution: Measure your outer diameter accurately to ensure a proper fit with standard couplings and adapters.
XiHu SP20286 Horizontal Vent Kit
The SP20286 kit focuses on 3-inch vent terminal systems with exterior-wall compatibility. It includes durable screws for straightforward exterior installation and emphasizes weather resistance for outdoor conditions. It aims for a sturdy, corrosion-resistant exterior finish.
Who it’s best for: Projects requiring a 3-inch exterior vent on an outside wall with reliable hardware.
Why chosen: It provides durable installation hardware and a robust exterior finish option.
Caution: Ensure your wall thickness and vent diameter match the kit specifications before purchase.
Rheem RTG20280-1 ProTech Horizontal Vent Kit
The ProTech kit by Rheem includes durable stainless steel components, a complete 12-inch wall plate with mounting screws, and an angled 94-degree elbow to help with proper venting configuration. This kit targets robust, long-term outdoor installations that benefit from stainless steel construction and a comprehensive mounting system.
Who it’s best for: Builders or homeowners needing a durable stainless option with full mounting hardware.
Why chosen: The combination of material durability and complete installation hardware supports reliable, long-lasting vent runs.
Caution: Confirm wall thickness compatibility and ensure the elbow angle fits your vent route to avoid clearance issues.
Buying Guide
What to consider when selecting a tankless water heater PVC vent termination kit:
- Vent diameter and compatibility: Most kits support 2- or 3-inch piping. Confirm your appliance’s vent size before buying.
- Concentric vs. dual-pipe: Concentric kits combine intake and exhaust in one outer shell, saving space. Dual-pipe designs separate intake and exhaust for certain installations.
- Exterior finish and mounting: Choose kits with low-profile designs or paintable finishes if aesthetics on exterior walls matter.
- Material durability: Stainless steel components resist corrosion and outdoor exposure better than plain metal or plastic.
- Installation hardware: Complete wall plates, screws, and elbows reduce additional shopping for compatible parts.
- Location considerations: Exterior-wall installations benefit from weather-resistant designs; roof or high-wall vents require robust debris protection.
Frequently Asked Questions
- What is the purpose of a vent termination kit for tankless water heaters?
Answer: It provides a safe, code-compliant outlet for exhaust and/or intake, improves appearance, and protects piping from weather and debris. - Do I need a concentric vent kit for my tankless heater?
Answer: Concentric kits save space and can simplify exterior routing, but check your unit’s venting requirements. - Can I install PVC vent kits on an exterior wall?
Answer: Yes, many kits are designed for exterior-wall mounting; verify wall thickness and clearances first. - What maintenance is required for vent termination caps?
Answer: Regular inspection for debris and corrosion; ensure drainage slots remain unobstructed. - Are all 2-inch and 3-inch vent kits interchangeable across brands?
Answer: Not always; verify diameter, shell type, and mounting dimensions with your appliance specs. - Is stainless steel better than other materials for vent kits?
Answer: Stainless steel offers superior corrosion resistance for outdoor exposure and long-term durability.