Big Dog Specials

Hot Tub Girl 


This is the most powerful MWT device on the Market, bar none!!

It's the BIG Dog!!

Each model TAT-21 uses two 2" x 2" x 1" N42 Grade Triple Plated Neodymium Rare Earth Magnets.

Each magnet has a pull force of 200 pounds (400 pound combined pull force)

The magnets alone are a $ 240.00 value.

Handle with care!  These magnets can bite!! 

Model TAT-21 Trentatron (for Spas, Pools, Commercial or Well Water Service)

Model TAT-21 with 2.5" PVC Spacer Pipe

Model TAT-21 Trentatron (for Well Water Systems, Spas, Pools, Commercial Water Service)

Designed for 1 1/4 Inch to 2 1/2 Inch Copper or

1 Inch to 2 1/2 Inch PVC pipe sizes.

Peak Flux density ≥ 6100 Gauss@ min. pipe O.D.

Maximum Temperature 175° F.

200 lbs. Pull Force per Magnet.  400 lbs. Combined

Magnets are 2" Long x 2" Wide x 1" Thick

Weight: 4 lbs. 13 oz.

Frame is 5.25" Tall x 3" Long x 4.00" Wide (including bolts)

Warning:  These are extremely powerful magnets.

Retail Price: $320.00

Internet Sales Price: $ 250.00


Free US Priority Mail Shipping


We Provide Free USPS Priority Mail Shipping to the US!

Please contact us for International Shipping Quotes! 


Trentatrons are the most powerful permanent magnet water conditioning devices available They produce a flux field density that is 5 TIMES STRONGER  than any ceramic (ferrite) magnet based device on the market.  This is made possible through the use of high grade Neodymium rare-earth magnets and a heavy carbon structural steel frame. 


Trentatrons provide an environmentally friendly, cost effective addition to conventional pool & SPA water treatments. 


Are you a pool owner with "very hard water" service?  If so, you really need a magnetic water conditioner to eliminate the ugly scale buildup on your pool surfaces.  Why scrape and scrub your tile surfaces every year when a Trentatron will continually do it for you.  Permanently eliminate scale buildup.


Adding a Trentatron  to your spa or pool will provide the following benefits:

  • Reduce the chemical levels you must maintain in the water, thereby reducing maintenance costs and skin and eye irritations.

  • Provide a softer more silky feeling water.

  • Improve the water clarity.

  • Help stabilize  the ph level of the water.

  • Help fight the growth of algae and bacteria.

  • Improve the efficiency of your heater by eliminating scale, thereby reducing heater energy costs.

  • Improve the effectiveness of ozoneators and UV units.

  • And for those of us who can be neglectful of our spas, a more forgiving water that does not turn bad on us when we get busy. 

All pools and spas have water that is harder than the tap water with which they are filled. This is due to the evaporation of the water which leaves the minerals behind.  Harder  water results in higher water surface tension which lowers the solubility of the water  Chemicals added to the pool or spa do not blend well in this harder water. As a result, greater amounts of chemicals are required to perform at the same level. In addition, hard water precipitates out of solution and forms ugly scale on pool tiles and in the plumbing. Finally, hard pool or spa water "feels" hard and lacks clarity.  Magnetizing the water using our Trentatrons will reduce the water surface tension which greatly improves the functions of the pool chemicals.  This allows you to dramatically reduce the amount of chemicals used, saving you time and money.


Find out what many others have already found out.


Wow, these things really do work!  I would have never believed it, had I not seen it for myself!


Why buy a Trentatron over other similar products?  Namely, price, quality, and flux power density inside the pipe.

  • All Trentatrons use frames machined from heavy cold rolled steel material. 

  • Our frames have a Polyester Powder Coat finish for long term corrosion and UV resistance.

  • Our Neodymium magnets are extremely powerful and have a triple Nickel/Copper/Nickel plating for lifetime corrosion resistance.  They also have a lifetime power warranty.  These magnets have a pull force 200 pounds apiece (400 lb combined). Ceramic magnet based devices use 17 or 24 pound pull force magnets.

  • We use only stainless steel fasteners for long term corrosion resistance and minimal response to the magnet field.

This TAT-21 model is designed  mainly for commercial and  residential pool applications.  They are also suitable for commercial or well water service pipes starting with 1 1/4" copper or 1" PVC.