---
product_id: 58745756
title: "Flexvent 3/8\" Floatvent c/w shut-off valve - Automatic Air Vent 27750"
brand: "flamco"
price: "$79.90"
currency: USD
in_stock: true
reviews_count: 13
category: "Flamco"
url: https://www.desertcart.ec/products/58745756-flexvent-3-8-floatvent-c-w-shut-off-valve-automatic
store_origin: EC
region: Ecuador
---

# Automatic air bleed valve Supports up to 90°C continuous temp 3/8 inch brass thread Flexvent 3/8" Floatvent c/w shut-off valve - Automatic Air Vent 27750

**Brand:** flamco
**Price:** $79.90
**Availability:** ✅ In Stock

## Summary

> 💡 Elevate your heating system with the smart, sleek Flamco Flexvent!

## Quick Answers

- **What is this?** Flexvent 3/8" Floatvent c/w shut-off valve - Automatic Air Vent 27750 by flamco
- **How much does it cost?** $79.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/58745756-flexvent-3-8-floatvent-c-w-shut-off-valve-automatic)

## Best For

- flamco enthusiasts

## Why This Product

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

## Key Features

- • **Temperature Toughness:** Handles system temps up to 90°C with 120°C peak tolerance
- • **Dirt-Proof Seal Design:** Protective chamber keeps the seal seat clean for lasting performance
- • **Factory-Tested Quality:** Every unit rigorously tested before shipping for guaranteed reliability
- • **High-Pressure Resilience:** Operates reliably up to 10 bar peak pressure
- • **Compact Precision Engineering:** Sleek brass housing fits tight spaces effortlessly

## Overview

The Flamco Flexvent 3/8" Floatvent with shut-off valve is a compact, brass automatic air vent designed for efficient air removal in heating systems. It features a 3/8 inch male thread, supports continuous operation up to 90°C and 6 bar pressure (with peaks up to 120°C and 10 bar), and includes a protective chamber to keep the seal clean. Factory-tested for quality, it ensures reliable performance and easy installation in tight spaces.

## Description

Free delivery and returns on all eligible orders. Shop Flamco Flexvent 3/8" Floatvent c/w shut-off valve - Automatic Air Vent 27750.

Review: Nice - Does the job, fitted to the top of a wall heated towel rad, that got all the air buildup. So yes ok
Review: Good product. Easy to install - These are good bleed valves.

## Features

- Automatic bleed valve with very compact br housing and 3/8 inch male thread.
- The T-Plus is the perfect solution for setting up branches or other changes to operational structures.
- Thanks to its extremely compact shape, the Flamco Flexvent 3/8 inch valve can be easily installed in any system that can be installed at a temperature below 90°C (with a tip of max. 120°C) and a pressure of 6 bar (with a peak of max. 10 bar).
- As a quality , every Flamco nozzle is tested before it leaves our factory.
- The Flexvent seal seat is protected from dirt as the protective chamber is placed on the float

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0042ZQGKM |
| Best Sellers Rank | 84,980 in DIY & Tools ( See Top 100 in DIY & Tools ) 726 in Central Heating System Accessories |
| Brand | Flamco |
| Customer Reviews | 4.5 out of 5 stars 1,255 Reviews |
| Exterior Finish | Brass |
| Exterior finish | Brass |
| Inlet Connection Size | 0.38 Inches |
| Inlet Connection Type | Brass |
| Inlet connection size | 0.38 Inches |
| Inlet connection type | Brass |
| Item Dimensions | 23 x 3 x 80 centimetres |
| Item Weight | 0.01 Kilograms |
| Item dimensions L x W x H | 23 x 3 x 80 centimetres |
| Manufacturer | Flamco |
| Material | Brass |
| Maximum Pressure | 10 Bars |
| Model Number | 27750 |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 9.53 Millimeters |
| Outlet Connection Type | NPT |
| Part Number | 27750 |
| Size | R 3⁄8" |
| Specification Met | DIN |
| Thread Size | 3/8 duim |
| Thread Type | M (Manufacturer |
| Unit Count | 1.0 count |
| Valve Type | Float Valve |

## Product Details

- **Brand:** Flamco
- **Exterior finish:** Brass
- **Inlet connection size:** 0.38 Inches
- **Inlet connection type:** Brass
- **Item dimensions L x W x H:** 23 x 3 x 80 centimetres
- **Material:** Brass
- **Maximum operating pressure:** 10 Bars
- **Number of ports:** 2
- **Outlet connection size:** 9.53 Millimeters
- **Outlet connection type:** NPT

## Images

![Flexvent 3/8" Floatvent c/w shut-off valve - Automatic Air Vent 27750 - Image 1](https://m.media-amazon.com/images/I/712Kkf4x-aL.jpg)

## Questions & Answers

**Q: do you have to drain down hot water tank to fit this valve which is replacing a blown one of the same please**
A: It all depends on your system and why / where the valve is installed etc. On my system it was (almost) at the top of the central heating radiator circuit and was completely separate from the hot water storage tank. I just needed to turn off the water supply and electric then drain sufficient water from the radiator loop so the water level and pressure fell sufficiently to allow me to safely replace the valve. I then had to restore the water level and bleed the system etc. Your central heating system is probably very different from mine, so this may not apply in your case.  Irrespective of where ithe valve is located in the circuit you will definitely need to at least partially drain your system as the valve is intended to operate under pressure. If in doubt, consult a plumber.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice
*by M***H on 21 May 2026*

Does the job, fitted to the top of a wall heated towel rad, that got all the air buildup. So yes ok

### ⭐⭐⭐⭐⭐ Good product. Easy to install
*by M***. on 19 February 2026*

These are good bleed valves.

### ⭐⭐⭐⭐ It's 1/2 inch and comes with a closure valve.
*by M***F on 21 December 2019*

Easy to install and seems to work. Give it 4 weeks and I'll come back and buy a few more if it successfully clears air buildup in my manifolds.

## Frequently Bought Together

- Flamco Flexvent 3/8" Floatvent c/w shut-off valve - Automatic Air Vent 27750
- LOCTITE 55, Thread Sealing Thread for Quick Seal, Thread Seal for Pipe Threads and Fittings, for Threads Made of Metal and Plastic, 1 x 160 m
- Variosan Automatic Quick Release Vent In Polished Brass, Thin Shape, With Mounting Valve 1.3 cm (1/2 ")

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**Shop now:** [https://www.desertcart.ec/products/58745756-flexvent-3-8-floatvent-c-w-shut-off-valve-automatic](https://www.desertcart.ec/products/58745756-flexvent-3-8-floatvent-c-w-shut-off-valve-automatic)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-09-30*