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MCD-250U NEXT GENERATION Swim Spa Ozonator by DEL Ozone for up to 3,000 Gallons (Dual Voltage)

  • DEL Ozone MCD-250U CD Ozonator for Large Hot Tubs and Swim Spas to 3,000 Gallons, DUAL VOLTAGE
  • AMP Plug
  • Mini Ozone Plug option
  • Sundance and Jacuzzi 120V Plug option (ignore the black end, this is an adapter cord.  DEL finally released the MCD-250 with the blue plug, so you no longer need to spend $8 on the adapter cord!)
  • Sundance and Jacuzzi 240V Plug option
  • Sundance and Jacuzzi 120V Molex Adapter Plug option
  • Sundance and Jacuzzi 240V Adapter Plug option
  • Flag Connectors (used primarily by Hot Spring Spas)
2.60 LBS
IN STOCK - Ships immediately!
Calculated at checkout

Product Description

The MCD-250 Spa Ozonator for large hot tubs or swim spa gives you crystal clear water with 60-90% less chemicals.  Easily handles spas and hot tubs up to 3,000 gallons.  DEL's MCD-250U has the longest lifespan of any spa ozone generator on the market, lasting 3-5 years, and it is RENEWABLE!*

MCD-250U Swim Spa Ozone Generator specifications:

  • 120-240V, 50-60Hz (Auto-Sensing)
  • Shipping Weight:  4 lbs
  • 8.6"H x 6.1"W x 2.8"D
  • Ozone Output: 125 mg/hr
  • Listings:  UL, cUL, CE

The MCD-250U Swim Spa Ozone Generator includes: 

DEL Ozone has streamlined their MCD-250U.  As of December 2020, the only one they manufacture now is the AMP Cord.  Luckily, we still have a few other options in stock:

  • AMP - white, rectangular, four holes, three wires (blue/brown/green which are European colors and they match up to domestic colors of white/blue/green)
  • Sundance and Jacuzzi 120V, recycle-bin blue
  • Sundance Molex 120V Adapter Cords - Molex plug is small, square, white plastic, four holes, three wires
  • Hot Springs Flag Connectors (they look like mini flags!)

*Get your MCD-250U Renewal Kit with your purchase of DEL's MCD-250U and get $10 off when you use Coupon Code:  "MCD-250U Renew"

Why use ozone in spas?  Ozone is the most powerful spa sanitizer, 200 times more powerful than chlorine at killing viruses and bacteria.  Aiding in the filtration process, ozone clears up cloudy spa water and significantly reduces the need for bromine, chlorine, spa shock and other spa chemicals.
RESOURCE CENTER | Download the following here:

MCD-25U0 Swim Spa Ozone Generator Brochure
MCD-250U Swim Spa Ozone Generator Installation and Operations Manual
How Does Ozone Get Into Hot Tub and Swimming Pool Water? (Article)

DEL Ozone has been supplying hot tub and spa manufacturers with ozone for over 20 years.  If you have a portable hot tub, chances are it already has a DEL Ozonator. Thermo Spas and Country Leisure Spas use the MCD-250 for their larger hot tubs and swim spas.

AUGUST 2015:  DEL Ozone converted their MCD-250 Swim Spa Ozone Generator from using the 5-1308-04 CD Ozone Electrode to using the ultra-modern APG Ozone Module.  One of the best features of this update is that the MCD-250 is now Universal Voltage and Hertz!  120V, 240V, 50Hz, 60Hz - it does it all.

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Product Reviews

Showing reviews 1-4 of 5 | Next

  1. Great Ozone Generator 5 Star Review

    Posted by on 26th Sep 2020

    Great service and fast shipping. Installation was easy and it works great!

  2. Does exactly what it says, installation was easy! 5 Star Review

    Posted by on 20th Apr 2018

    Yes the product is great, does exactly what it is supposed to and was trivial to install. The best part was dealing with Jen at loveyourhottub.com because she helped me pick the right product for my situation, gave me advise on installation, and insights about expected longevity and replacing the check valves! So 5 stars for loveyourhottub.com too! I’ll be back for supplies!

  3. Got a SwimSpa? You're gonna want one of these!!! 5 Star Review

    Posted by on 25th Jul 2016

    So, to put it simply, this Ozonator MCD-250 will cut down maintenance use by an easy 60-90 percent based on how often you use your spa/swim spa my wife and I use our swim spa for approx 5-7 days a week and I'm putting in a small capful of shock once a week to help break up oils and move it to the filters but other than that I'm probably adding only 2-3 bromine tablets a week at the most..before I was adding a pound almost and that's mainly due to the fact that it's a swim spa with 3 times your typical water volume in a normal hot tub. The MCD-250 also allows you to use less bromine and chemicals overall...only 1 part per million (ppm) as opposed to 3-5ppm. We purchase a box of 18lbs of bromine tablets from swim spa and I haven't come close to needing to dip into that yet all thanks to the brominator...Buyers beware of dealers trying to sell you ozonators for your spa that don't have enough air output according to the water volume in your spa. Catalina tried selling me an MCD-50 that supports up to 1000 gallons which is great for a Normal size hot tub but for a swim spa, the MCD-250 is the Best Buy your going to find and the easiest..also NO ozone smell at all with this one.

  4. new del ozone mcd-250-u ozonator 5 Star Review

    Posted by on 25th Dec 2015

    Great service on the new ozonator. loveyourhottub.com took the extra time to make sure the unit was functioning correctly. The unit makes water chemistry much easier.

Showing reviews 1-4 of 5 | Next