GFCI WR question

A WR GFI uses stainless components and screws. GFI's are notorious for rusting, especially at the mounting screws. The one that went bad was probably older, before WR's were even available.

Yes, you need a WR GFI, and an in-use cover. In fact, I'd venture to bet that much of your installation is not up to code. IF it is that close to the pool the receptacle and plug must be of the locking type (twist-lock), and the circuit protected by an upstream GFI. The outside portion of the wiring to a pool motor must also be in conduit with individual insulated conductors. Older codes would allow this installation located between 5-10 feet from the pool, but NO closer than 5'. Also, the cord on the motor should be no longer than 3' and must be #12 or larger.

There are MANY codes involved with pool installations, I hope yours meets them.

Probably no reason to use a WR outlet. The "WR" rating may not mean what you think it means. The primary difference between a WR outlet and a regular one is the WR one uses a special kind of plastic that does not get as brittle when cold and has better UV protection so it does not get damaged by direct sunlight. It does not provide any additional water resistance. If the outlet is going to be subject to direct water spray (either indoors or outdoors) it should be protected by a weatherproof outlet cover.

(It's possible a Tamper Resistant outlet would provide a small amount of protection against water since there are shutters that cover the slots, but that's certainly not what it's designed for. You may or may not want to install TR outlets, depending on whether it's required by code and/or you have kids.)