# COMAR Title 10 — Maryland Department of Health

## Subtitle 17 — Swimming Pools and Spas

### Chapter 01 — Public Swimming Pools and Spas

#### Regulation .30 Hydrostatic Relief Valves.

*COMAR 10.17.01.30*

An owner shall ensure that an in-ground recreational pool, semipublic pool, or public spa has hydrostatic relief valves as needed to relieve the hydrostatic pressure from ground water when the pool or spa is empty.