A gas meter earthquake valve is designed to shut off gas automatically when it detects strong seismic movement. The best choice depends on your pipe size, required valve orientation, and local requirements. The Watts Little Firefighter 1-inch assembly is a candidate for 1-inch connections; the listed 3/4-inch horizontal valves suit buyers seeking that size and orientation. Have a qualified gas professional verify the correct model and installation before buying.
| Product | Best For | Key Listed Detail |
|---|---|---|
| Watts Little Firefighter 1-inch | Buyers checking 1-inch NPT options | 1-inch NPT assembly |
| Firefighter AGV075 | 3/4-inch horizontal installations | Reset after a 5.4 earthquake |
| Firefighter AGV-75 | Buyers comparing an AGV-75 model | 3/4-inch horizontal valve |
| Seismic Products 300 Series | 3/4-inch horizontal installations | 300 Series model |
| Watts Little Firefighter 3/4-inch | Buyers needing listed reset and fuel details | 3/4-inch NPT; natural gas and propane |
Watts Little Firefighter 1-Inch Assembly
This assembly is best for buyers whose professional installer confirms a 1-inch NPT connection is appropriate. Its listed name identifies it as a Watts Little Firefighter earthquake shutoff assembly. The product data supplied here does not specify its orientation, pressure limit, reset method, or fuel compatibility, so verify those details with the seller or manufacturer before choosing it.
Firefighter AGV075 3/4-Inch Horizontal Valve
This model is best for buyers who need a 3/4-inch horizontal valve and want a listed reset detail. The product information describes it as a seismic automatic gas shutoff valve for a 3/4-inch house-line pipe and says it can be reset after a 5.4 earthquake. Confirm that the pipe measurement and required orientation match your installation. Do not assume the listing establishes local code approval.
Firefighter AGV-75 3/4-Inch Horizontal Valve
Choose this option if you are comparing the AGV-75 model and need a 3/4-inch horizontal valve. The supplied listing identifies the product as a Firefighter Gas Safety Products AGV-75 gas safety valve. The provided features do not state a seismic activation threshold, fuel type, pressure rating, or reset instructions. Verify these specifications before purchase; the available details are less complete than those for some alternatives.
Seismic Products 300 Series Horizontal Valve
This valve is best for shoppers comparing a specifically named 300 Series model for a 3/4-inch horizontal setup. Its listed features identify it as an earthquake gas shut-off valve with a 3/4-inch horizontal configuration. The provided information does not specify reset steps, fuel compatibility, or activation threshold. Ask a qualified installer to confirm those requirements and whether this model suits the meter piping.
Watts Little Firefighter 3/4-Inch NPT Valve
This is best for buyers who need a 3/4-inch NPT connection and value clearly listed fuel, pressure, and reset details. The supplied features say the valve activates at a seismic event of magnitude 5.4 or greater, supports natural gas and propane, has a maximum pressure capacity of 10 psi, and offers manual reset access on both sides. The features describe it as vertical, so avoid choosing it for a horizontal installation unless the manufacturer confirms that orientation is suitable.
Buying Guide: How To Choose A Gas Meter Earthquake Valve
What pipe size and connection do you need?
Start by confirming the actual connection size and thread type with a qualified gas professional. The products listed here include 3/4-inch options and one 1-inch NPT assembly. Do not select a valve based only on the apparent size of the meter or pipe; the correct connection must match the installation.
Does the valve need to be horizontal or vertical?
Orientation is a key comparison point. Several listings specify horizontal installation, while the Watts 3/4-inch feature description identifies a vertical valve. Confirm the required orientation for the exact model and installation location before ordering. A size match alone does not confirm that a valve is suitable.
Which product specifications should you verify?
Check the seismic activation threshold, fuel compatibility, maximum pressure, reset procedure, and installation orientation. These details vary in how completely they are described in the supplied product information. Also ask whether the valve meets applicable local requirements. Product descriptions alone cannot establish that it is approved for a particular home or jurisdiction.
Who should install and reset the valve?
Use a qualified gas professional to confirm selection and installation requirements. After an earthquake or valve activation, follow the manufacturer’s reset instructions and local safety guidance. If you smell gas, leave the area, avoid operating switches or flames, and contact the gas utility or emergency services from a safe location.
Frequently Asked Questions
What does a gas meter earthquake valve do?
It is designed to automatically shut off gas when it detects seismic movement at or above its activation threshold. The threshold depends on the specific model.
Can I choose a valve by pipe size alone?
No. Confirm the connection, orientation, fuel compatibility, pressure rating, and local requirements as well as pipe size.
Are horizontal and vertical valves interchangeable?
Do not assume they are. Follow the exact product instructions and have an installer confirm the required orientation.
Can I reset an earthquake gas valve myself?
Reset procedures depend on the model. Follow its manufacturer instructions, and do not reset a valve if you suspect a gas leak.
Does a 5.4 activation detail apply to every product here?
No. The supplied features list that detail for the Firefighter AGV075 and Watts Little Firefighter 3/4-inch model. Verify the specifications of any other valve separately.