This Old House plumbing and heating expert Richard Trethewey fixes a faulty shower valve with new valve stems and seats. (See below for a shopping list, tools, and steps.) SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse Shopping List for How to Repair a Shower Valve Stem: Cloth [https://amzn.to/2m0Gs3D], for plugging up drainpipe Replacement valve stems [https://amzn.to/2lmWSTH] […]