What if my mansfield outdoor faucet is leaking I'm not sure what series this is, but water leaks from the handle when the spigot is turned on If your mansfield outdoor faucet is leaking, it’s likely due to a faulty cartridge or valve stem, or a problem with the faucet body or handle.
How to Fix a Leak in the Anti-Siphon Valve of an Outdoor Faucet
After replacing the inner stem, ensure the packing nut is tightened properly without overtightening, which can deform seals