Health care, medical, and specialty plumbing systems
Health-care and specialty systems
Health-care plumbing emphasizes infection control, reliable hot water, and protection from cross-connections. Handwashing sinks must be accessible and supplied with tempered water. Clinical sinks, bedpan washers, and equipment connections need air gaps or listed backflow protection. Emergency eyewash and shower stations must be reachable within about 10 seconds and deliver tepid water. Laboratory sinks may discharge acid or chemical waste to neutralization or holding systems. Dialysis, medical vacuum, and medical gas systems are specialty scopes with separate qualification requirements.
Design details
Avoid dead legs and stagnant piping that promote Legionella. Maintain hot-water recirculation and correct temperatures at points of use. Trap primers protect floor drains in sterile and mechanical rooms. Cleanouts and access panels must remain available. Use corrosion-resistant materials for specialty waste and separate incompatible waste streams.
Worked example
A laboratory adds a sink for acid waste. The sink discharges through an acid-resistant trap to an indirect waste receptor connected to a neutralization tank, not directly to the sanitary drain. The tank is vented and accessible. The potable water supply to the lab faucet has an air gap or approved backflow preventer. The emergency eyewash is placed within 10 seconds of the hazard and supplied with tepid water. A direct connection to the sanitary system would allow acid and cross-connection hazards.
Traps
Direct-connecting lab equipment; no trap primer; dead legs; scald risk at hand sinks; eyewash too far or cold; mixing acid waste with ordinary metal pipe; assuming medical gas is ordinary plumbing.