---
product_id: 475190545
title: "New Floodstop Water Heater Auto-Shutoff Valve FS3/4NPT v4 (Lead free)"
price: "¥131003"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/475190545-new-floodstop-water-heater-auto-shutoff-valve-fs3-4npt-v4
store_origin: JP
region: Japan
---

# New Floodstop Water Heater Auto-Shutoff Valve FS3/4NPT v4 (Lead free)

**Price:** ¥131003
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** New Floodstop Water Heater Auto-Shutoff Valve FS3/4NPT v4 (Lead free)
- **How much does it cost?** ¥131003 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/475190545-new-floodstop-water-heater-auto-shutoff-valve-fs3-4npt-v4)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

New Floodstop Water Heater Auto-Shutoff Valve FS3/4NPT v4 (Lead free)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Onsite Pro |
| Part Number | FS3/4NPT v4 |
| Item Weight | 1.92 pounds |
| Product Dimensions | 12 x 8 x 3 inches |
| Item model number | FS3/4NPT v4 |
| Is Discontinued By Manufacturer | No |
| Size | One Size |
| Style | Valve |
| Material | Wood |
| Thickness | 1 Miles |
| Item Package Quantity | 1 |
| Measurement System | US |
| Included Components | FS3/4NPT |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![New Floodstop Water Heater Auto-Shutoff Valve FS3/4NPT v4 (Lead free) - Image 1](https://m.media-amazon.com/images/I/91xbnRzOAaL.jpg)

## Questions & Answers

**Q: Replaced the batteries twice with new Duracell’s. The unit is back online, and the valves work, no moisture, but we still get a beep every 60 sec?**
A: Defective Unit. Have two units for a year.  So Far, So Good.  Cycling each  month is a good idea.  Batteries are a Backup system for power outage.

**Q: Is there an indication (light etc.) if the unit is running only on batteries but not on AC power?**
A: no.  only low battery notification

**Q: If there is problem with the unit can it be opened manualy?**
A: Yes, there are instructions in the manual included.  I elected to install a parallel shut off valve beside the flood stop valve. I purchased two tees and a valve. I had some pex pipes and crimp clamps on hand, so minimal expense.  Valve is normally closed. If the flood stop would close and you want water, open your bypass valve.  Be careful, you may have a leak.

**Q: Do I really need this if my tank is by a couple of floor drains?**
A: Why wouldn't you even with the drains? Your tank leaks, the valve closes, the water stops and you buy a new heater. It's like an insurance policy. Hopefully you don't use it but it's good to know it's there if you do..

---

## 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.jp/products/475190545-new-floodstop-water-heater-auto-shutoff-valve-fs3-4npt-v4](https://www.desertcart.jp/products/475190545-new-floodstop-water-heater-auto-shutoff-valve-fs3-4npt-v4)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-25*