--- product_id: 27829914 title: "300 Series Horizontal Earthquake Gas Shut-Off Valve, 3/4-Inch" brand: "pacific seismic products" price: "¥76455" currency: JPY in_stock: true category: "Pacific Seismic Products" url: https://www.desertcart.jp/products/27829914-300-series-horizontal-earthquake-gas-shut-off-valve-3-4 store_origin: JP region: Japan --- # Earthquake-triggered safety Manual reset, no power needed 3/4-inch NPT precision fit 300 Series Horizontal Earthquake Gas Shut-Off Valve, 3/4-Inch **Brand:** pacific seismic products **Price:** ¥76455 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in safety before the next quake hits! ## Quick Answers - **What is this?** 300 Series Horizontal Earthquake Gas Shut-Off Valve, 3/4-Inch by pacific seismic products - **How much does it cost?** ¥76455 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/27829914-300-series-horizontal-earthquake-gas-shut-off-valve-3-4) ## Best For - pacific seismic products enthusiasts ## Why This Product - Trusted pacific seismic products brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power-Free Operation:** No batteries or electricity required—reliable mechanical trigger ensures constant readiness. - • **Clear Status Indicator:** Built-in sight glass shows open/closed valve status at a glance for peace of mind. - • **Seismic-Activated Safety:** Automatically shuts gas flow during earthquakes to prevent fire hazards. - • **Durable Metal Construction:** Robust steel body designed to withstand harsh conditions and ensure long-term protection. - • **Precision 3/4-Inch NPT Fit:** Standardized inlet/outlet connections for seamless integration with existing gas lines. ## Overview The 300 Series Horizontal Earthquake Gas Shut-Off Valve by Pacific Seismic Products is a 3/4-inch swing check valve engineered to automatically stop gas flow during seismic events. Featuring a mechanical, acceleration-sensitive trigger with a steel ball mechanism, it requires no external power and includes a sight glass for easy status monitoring. Designed for easy installation upstream or downstream of gas regulators, this durable metal valve enhances home and workplace safety by reducing fire and explosion risks after earthquakes. ## Description Product Description Pacific Seismic/California Valves are earthquake sensitive gas shut-off valves. They are intended to close in the event of an earthquake to prevent gas flow into a structure where earthquake damage may have occurred. The valve reduces the potential for fire or explosion due to the release of natural gas into a structure where gas lines, gas fixtures, or gas appliances. PSP's valves do not use any source of internal or external electrical power. They are designed to remain closed until manually reset. The valves are intended to be mounted in the gas line upstream or downstream of the gas-line pressure regulator and gas meter outside the structure. These valves do not replace the manual upstream shut-off valves provided in the gas service line. Our valve consists of a swing check valve arrangement with an acceleration-sensitive triggering mechanism. The trip mechanism consists of a steel ball resting on a tapered cup-shaped support. The horizontal motion of an earthquake causes the ball to move from the center of the support. This allows the balls mass to act upon the movable pipe of the trip mechanism, activating the valve and initiating closure. Springs assist the valve- flapper to close and gas pressure assists in holding the valve disc in the closed position. The trip mechanism is factory set and sealed. A sight glass is provided so that the Open or Closed indicator can be seen and the trip mechanism status of the valve can be easily determined. From the Manufacturer Pacific Seismic/California Valves are earthquake sensitive gas shut-off valves. They are intended to close in the event of an earthquake to prevent gas flow into a structure where earthquake damage may have occurred. The valve reduces the potential for fire or explosion due to the release of natural gas into a structure where gas lines, gas fixtures, or gas appliances. PSP's valves do not use any source of internal or external electrical power. They are designed to remain closed until manually reset. The valves are intended to be mounted in the gas line upstream or downstream of the gas-line pressure regulator and gas meter outside the structure. These valves do not replace the manual upstream shut-off valves provided in the gas service line. Our valve consists of a swing check valve arrangement with an acceleration-sensitive triggering mechanism. The trip mechanism consists of a steel ball resting on a tapered cup-shaped support. The horizontal motion of an earthquake causes the ball to move from the center of the support. This allows the balls mass to act upon the movable pipe of the trip mechanism, activating the valve and initiating closure. Springs assist the valve- flapper to close and gas pressure assists in holding the valve disc in the closed position. The trip mechanism is factory set and sealed. A sight glass is provided so that the Open or Closed indicator can be seen, and the trip mechanism status of the valve can be easily determined. ## Features - Earthquake Gas Shut-Off Valve - 3/4" Horizontal Valve - Model 300 Series - Model number: 300 Series ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00KHJ8SHG | | Best Sellers Rank | #343,707 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #477 in Faucet Valves | | Brand Name | Pacific Seismic Products | | Customer Reviews | 4.4 4.4 out of 5 stars (58) | | Exterior Finish | Steel | | Global Trade Identification Number | 00804551664229 | | Inlet Connection Size | 0.75 inches | | Inlet Connection Type | National Pipe Tapered | | Item Dimensions | 3.9 x 4 x 8.75 inches | | Item Weight | 2.5 pounds | | Manufacturer | Pacific Seismic Products | | Manufacturer Part Number | 1 | | Material Type | Metal | | Model Number | 300 Series | | Number of Items | 1 | | Number of Ports | 2 | | Outlet Connection Size | 0.75 inches | | Outlet Connection Type | NPT | | Size | 3/4 inches | | Thread Size | 3/4 inches | | UPC | 804551664229 | | Unit Count | 1 Count | | Valve Type | Swing Check Valve | ## Product Details - **Brand:** Pacific Seismic Products - **Exterior Finish:** Steel - **Global Trade Identification Number:** 00804551664229 - **Inlet Connection Size:** 0.75 inches - **Inlet Connection Type:** National Pipe Tapered - **Item dimensions L x W x H:** 3.9 x 4 x 8.75 inches - **Material:** Metal - **Number of Ports:** 2 - **Outlet Connection Size:** 0.75 inches - **Outlet Connection Type:** NPT ## Images ![300 Series Horizontal Earthquake Gas Shut-Off Valve, 3/4-Inch - Image 1](https://m.media-amazon.com/images/I/71ADUdzsWXL.jpg) ## Questions & Answers **Q: Can this be used between meter and manifold supporting 4 gas meters (small victorian apartment)?** A: You should contact the company about this. Instructions say it should be installed post-meter, likely because anything pre-meter should only be handled by the gas utility. Might be doable, maybe the gas utility would just need to install it themselves. **Q: Re the pacific seismic products, 300 series, horiz. what is the direction of gas flow? and 2. where is the reset mechanism located on the unit?** A: There is an arrow on the unit showing the direction of the gas flow (If you enlarge the picture, you'll see it). Gas flows in from the side closest to the chain. and exit from the side closest to the knob. The knob is where you reset the unit. **Q: Does the verticle valve work for an upward flow?** A: They have two different types of vertical valves. Top inlet which has the prefix VT before the model number and Bottom inlet which has the prefix VB before the model number. Up flow would need to be a VB. **Q: how do you re-set this model ?** A: Use a screw driver and turn it 90 degrees at the specified slot. Easy task ## Frequently Bought Together - Pacific Seismic Products 300 Series Horizontal Earthquake Gas Shut-Off Valve, 3/4-Inch - Moen Flo Smart Water Monitor and Automatic Shutoff Sensor, Wi-Fi Connected Water Leak Detector for 1-Inch Diameter Pipe, 900-006 - Pacific Seismic Products 301 Series Horizontal Earthquake Gas Shut-Off Valve, 1-Inch --- ## 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/27829914-300-series-horizontal-earthquake-gas-shut-off-valve-3-4](https://www.desertcart.jp/products/27829914-300-series-horizontal-earthquake-gas-shut-off-valve-3-4) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-15*