---
product_id: 85413719
title: "Valterra-Bristol Model Auto Drain"
brand: "barker"
price: "¥46850"
currency: JPY
in_stock: true
reviews_count: 13
category: "Barker"
url: https://www.desertcart.jp/products/85413719-valterra-bristol-model-auto-drain
store_origin: JP
region: Japan
---

# Compact 10.1x6.5x5.7 inch dimensions Low 12V power draw actuator 3-inch valve size Valterra-Bristol Model Auto Drain

**Brand:** barker
**Price:** ¥46850
**Availability:** ✅ In Stock

## Summary

> 🚐 Drain Smarter, Not Harder — Upgrade Your RV Game!

## Quick Answers

- **What is this?** Valterra-Bristol Model Auto Drain by barker
- **How much does it cost?** ¥46850 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/85413719-valterra-bristol-model-auto-drain)

## Best For

- barker enthusiasts

## Why This Product

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

## Key Features

- • **Reliable & Low Power:** 3-second valve cycle with minimal 12V power consumption keeps your rig’s electrical system efficient and safe.
- • **Compact & Lightweight:** Sleek 1.9-pound design fits neatly in tight spaces without adding bulk or weight to your setup.
- • **Durable Synthetic Build:** Crafted from high-quality synthetic materials ensuring long-lasting performance in rugged outdoor conditions.
- • **Effortless Tank Draining:** One-button operation eliminates bending and reaching under your rig—drain tanks with ease and speed.
- • **DIY-Friendly Installation:** Straightforward setup with standard 4-conductor trailer wiring compatibility for seamless integration and customization.

## Overview

The Barker Valterra-Bristol Model Auto Drain is a 3-inch synthetic valve designed for effortless grey and black tank draining in RVs and motorhomes. Featuring a compact 10.1 x 6.5 x 5.7 inch footprint and lightweight 1.9-pound build, it operates on a low 12V power actuator with a quick 3-second cycle. Installation is DIY-friendly with standard trailer wiring compatibility, making it a durable, efficient, and convenient upgrade for camping and hiking enthusiasts seeking hassle-free water management.

## Description

Buy Barker Auto Drain 3in Valterra-Brstol Model: Hydration & Filtration - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: great product - easy install and works perfectly. Should have done this sooner. No more bending and reaching under the rig to empty tanks. Just attach the hose and press a button. Nice, neat and quick.
Review: Not enough wiring - ONE YEAR LATER....STILL WORKS GREAT. I have a motorhome that requires one to crouch under the slide to reach the tank drains. We have a washer on board and it will fill the grey tank in short order. So I wanted a simple way to just open the grey (while connected to sewer) while doing laundry etc. This fit the bill. Installation is straightforward and easy for any DYIer. However, the twist is the length of wiring harness from the control box to the valve actuator. I wanted my control box mounted beyond the included length. The smart thing that the manufacturer did was code the wiring harness the same as 4 conductor trailer wire. One package of trailer wire, quality water proof splicing and ALEX TECH cable protection, problem solved. I tapped the power into an existing 12vdc supply. The actuator on the 1.5 inch valve has a 3 sec cycle so the additional draw on the circuit I tapped is negligible.

## Features

- Product Type: Sporting Goods
- Package Dimensions: 14.478 L X 25.654 W X 16.51 H (Centimeters)
- Country Of Origin: United States
- Package Weight: 1.899 Pounds

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00A2TFXGA |
| Best Sellers Rank | #254,021 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #77 in Camping & Hiking Hydration Flasks |
| Brand Name | BARKER |
| Color | Grey |
| Customer Reviews | 4.2 4.2 out of 5 stars (81) |
| Date First Available | October 30, 2010 |
| Included Components | Barker Auto Drain 3in Valterra-Brstol Model |
| Item Dimensions LxWxH | 10.1 x 6.5 x 5.7 inches |
| Item Package Dimensions L x W x H | 10.1 x 6.5 x 5.7 inches |
| Item Weight | 1.9 Pounds |
| Manufacturer | Barker |
| Material | Synthetic |
| Model Name | 24130 |
| Number of Items | 1 |
| Package Weight | 1.9 Pounds |
| Part Number | 24130 |
| Size | 3-Inch |
| Sport Type | Camping & Hiking |
| Style | Modern |
| Suggested Users | unisex-adult |
| Warranty Description | Manufacturer Warranty |

## Images

![Valterra-Bristol Model Auto Drain - Image 1](https://m.media-amazon.com/images/I/71+p5uEgrgL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ great product
*by R***E on June 4, 2020*

easy install and works perfectly. Should have done this sooner. No more bending and reaching under the rig to empty tanks. Just attach the hose and press a button. Nice, neat and quick.

### ⭐⭐⭐⭐ Not enough wiring
*by J***D on June 16, 2024*

ONE YEAR LATER....STILL WORKS GREAT. I have a motorhome that requires one to crouch under the slide to reach the tank drains. We have a washer on board and it will fill the grey tank in short order. So I wanted a simple way to just open the grey (while connected to sewer) while doing laundry etc. This fit the bill. Installation is straightforward and easy for any DYIer. However, the twist is the length of wiring harness from the control box to the valve actuator. I wanted my control box mounted beyond the included length. The smart thing that the manufacturer did was code the wiring harness the same as 4 conductor trailer wire. One package of trailer wire, quality water proof splicing and ALEX TECH cable protection, problem solved. I tapped the power into an existing 12vdc supply. The actuator on the 1.5 inch valve has a 3 sec cycle so the additional draw on the circuit I tapped is negligible.

### ⭐⭐⭐⭐⭐ Best upgrade to our motorhome!
*by W***L on June 13, 2020*

This unit arrived on time and installation took about 2 hours total. I installed it on the grey water tank and ran the wiring inside near the water level indicators. We have stacked washer/dryer and wanted to be able to drain the grey water without having to run outside to drain. I did not want to install one one the black water as i want to be near the drain hoses when dumping it just in case there would be a problem. I had just enough wire in the provided harness to reach my switch location. The valve assembly just fit behind the basement door when the valve is opened and the door closed. I did the entire installation myself but it is not the easiest if not experienced. This is the number 1 upgrade we have made to our motorhome!

## Frequently Bought Together

- Barker Valterra-Bristol Model Auto Drain
- Valterra-T1003VPM Bladex 3-Inch Waste Valve Body with Metal Handle, Mess-Free Waste Valve for RV's, Campers, Trailers, Black

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-20*