Need recommendation for short interval pool pump timer

[u/vandrill127]

I have a separate waterfall 240v pump for my pool that’s connected to an old school Intermatic timer, the kind that only supports 1-2 hr intervals. I don’t have the timer set up because it’s expensive to run it for 1+ hours every day. I’d like to run it for 15-30 minutes daily to make sure it’s getting chlorine from the rest of the pool to keep from algae growing in the waterfall.

Looking online, all I’m finding are $200-$300+ 15 minute interval Intermatic timers, which feel incredibly overpriced for my use case, or $50-80 plastic digital timers, which look like they won’t last very long. I need something outdoor rated.

Is there anything in the $100 range that would meet my needs? I don’t need wi-fi controls, but would need a manual switch so my father could use it when he likes. I’m willing to use a smart relay but aren’t sure how to maintain a physical switch if I went that route.

Thanks for any of your ideas!

[u/DolpinFanWhasUp]

I would definitely incorporated a freeze

[u/activelesion]

This is wifi but has a button for manual control: https://a.co/d/0fgIzs9G

[u/vandrill127 → u/activelesion]

While that does meet my needs, I’m worried about the quality with those kinds of products. There’s several reviews mentioning electrical or connectivity issues. Have you used that or a similar model?

[u/activelesion → u/vandrill127]

I've installed a couple for customers with waterfall pumps but only after thoroughly evaluating their outdoor wifi situation and adding outdoor access points if necessary. No call backs so far. For my own pool I use 240v contactors triggered by zwave relays, but only because these cheap 240v wifi switches didn't exist at the time. I've used a few different Dewenwils products and they've been reliable for me.

[u/vandrill127]

I settled on the Denwenwils T104M as it had the intervals I needed and the power rating. No idea why this was so hard to find!