The figure below shows the two main families of acetylcholine receptors: muscarinic and nicotinic. In structural terms, muscarinic receptors are G-coupled protein receptors, while nicotinic receptors are ligand-gated ion channels. They can be found on both sides of the synaptic cleft (presynaptic and postsynaptic).
After the pressure drops below 40 psi, the electrical switch turns on the pump and the pressure in the tank increases. Any failure in any component or loss of electricity can cause a well to suddenly stop producing water when a faucet is turned on.
Water softeners can cause a sudden change or decrease in water pressure. To check it, switch the water softener to bypass mode and see if pressure improves. You may also want to have the water softener serviced by a service technician, if you believe itâs the cause of your low pressure. Clogged Aerators. If you only have low pressure at one faucet, it may be a clogged aerator. Check the aerator screen for rust, debris, and other particles restricting flow.