Hey there! The Spa Guy here. Let me tell you about this little gray filter standpipe cap - it's one of those small parts that makes a huge difference in keeping your spa's filtration working right.
I've replaced hundreds of these caps over the years on Hot Spring, Hot Spot, Tiger River, and Limelight spas. If yours is cracked, missing, or just worn out, this Watkins factory cap is exactly what you need. It fits a ton of models - we're talking Aria, Grandee, Sovereign, Jetsetter, Envoy, Prodigy, and many more from the early '90s right up to 2025 models.
The part numbers you might be looking for are 36513, 78932, or 78782 - they're all this same cap. Super easy to install yourself, and it'll keep your filter seated properly so your water stays crystal clear. Trust me, at this price, it's a no-brainer repair that'll save you from bigger headaches down the road. Got questions? I'm here to help!
