OAR 333-062-0100
Inlets
(1)
Pool inlets must be provided, sized, and arranged to produce a uniform circulation of water so as to maintain a uniform disinfectant residual throughout the pool.(2)
There must be at least one inlet per 400 square feet of pool area or 10,000 gallons of water, whichever is greater, with a minimum of two inlets.(3)
Grates must be designed so as to prevent entrapment of fingers.(4)
All recirculation inlet fittings must be adjustable for rate of flow. Wall inlet fittings must be directional.(5)
Inlet fittings must have tamper-proof screws that cannot be removed except with tools. Grates, vortex plates and inlet fittings must be in place whenever the spa is in use.(6)
Direct potable water pool inlets must:(a)
Be over-the-rim spouts with an air-gap located beside grab rails;(b)
Be through-the-wall fill lines located above the water level and equipped with an appropriate backflow prevention device installed per OAR 333-061-0071 (Backflow Prevention Assembly Installation and Operation Standards); or(c)
Be directly connected to the recirculation water supply and equipped with reduced pressure device installed per OAR 333-061-0071 (Backflow Prevention Assembly Installation and Operation Standards) on the potable water supply adjacent to the connection with the spa pool recirculation water.
Source:
Rule 333-062-0100 — Inlets, https://secure.sos.state.or.us/oard/view.action?ruleNumber=333-062-0100.