---
product_id: 20800712
title: "Thimble Wall Double B-Gas 4in"
brand: "american metal"
price: "€ 111.54"
currency: EUR
in_stock: true
reviews_count: 2
category: "Hi"
url: https://www.desertcart.sk/products/20800712-thimble-wall-double-b-gas-4in
store_origin: SK
region: Slovakia
---

# Thimble Wall Double B-Gas 4in

**Brand:** american metal
**Price:** € 111.54
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Thimble Wall Double B-Gas 4in by american metal
- **How much does it cost?** € 111.54 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/20800712-thimble-wall-double-b-gas-4in)

## Best For

- american metal enthusiasts

## Why This Product

- Trusted american metal brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Thimble Wall Double B-Gas 4in

## Features

- Adjustable from 4" to 6"
- 4" Size
- 2Wall
- Type A Vent Termination or Firestop
- ›See more product details

## Images

![Thimble Wall Double B-Gas 4in - Image 1](https://images-na.ssl-images-amazon.com/images/I/41h0UDwAKTL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    The hole is 4 -5/8"
  

*by J***N on Reviewed in the United States on February 23, 2013*

I bought 2 of these wall thimbles for a dual tankless (EZTankless) water heater install.  Why dual?  Where I live, the water outta the tap is 42 degrees. You'll only get a 35 degree rise at best from one tankless, so you need to feed one into the other to get up to shower temperature of 105.The hole is 4 -5/8" (air-gap around that is 6-5/8").  I believe this is for clearance.  You're just not going to get your 4" exhaust pipe "dead nuts on" lined up, so you need clearance.  I just got some scrap metal vent material, and made some flanges.  Cut a 6" circle, then cut a 4 -1/8" hole outta that, slide the flange up snug to the thimble, add 4 metal screws, put some of the supplied metal duct tape on for an air-tight fit - done!  Flanges really should be supplied with this kit.  If you don't have a pair of tin snips, and some scrap lying around, I've seen these for about $4 at the local hardware depot (but they are square, so you'll still need the tin snips if you want a professional looking install). You'll also need 1/2" sheet metal screws, and other 1" screws, or if your going up against drywall, maybe some drywall anchors etc. a power hand drill, and jig saw, etc.

### ⭐ 







  
  
    Not as described OR Shipped incorrectly multiple times.
  

*by M***T on Reviewed in the United States on January 8, 2019*

Product was not as described and shown. It’s not two interlocking pieces. It’s just one side. I ordered this and returned it as missing parts only to get the exact same thing as a replacement.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sk/products/20800712-thimble-wall-double-b-gas-4in](https://www.desertcart.sk/products/20800712-thimble-wall-double-b-gas-4in)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-18*