A low pressure domestic regulator is a device used to regulate the flow of gas from a propane or natural gas tank to a household appliance, such as a stove or water heater. It is designed to reduce the high pressure of gas from the tank to a safe and usable level for the appliance.

The low pressure domestic regulator typically consists of a valve that controls the flow of gas, a diaphragm that senses the pressure of the gas, and a spring that regulates the pressure. The regulator is installed in-line between the gas supply line and the appliance being used.

When the gas valve is opened on the appliance, the pressure in the gas line drops, causing the diaphragm in the regulator to move and allow more gas to flow through the valve. The spring inside the regulator helps to maintain a consistent pressure as the gas flows, ensuring safe and efficient operation of the appliance.

There are different types of low pressure domestic regulators, including single-stage and two-stage regulators. Single-stage regulators are typically used for smaller appliances, such as gas grills and outdoor heaters, while two-stage regulators are used for larger appliances, such as furnaces and water heaters.

Low pressure domestic regulators are important for maintaining the safety and efficiency of household gas appliances. It is important to have them installed by a qualified technician and to perform regular maintenance and inspections to ensure proper functioning.