| Streel Fuel Filter 5/16" - Red | professional-products.com | 1.5 USD | 15.99 USD | −90.6% |
| Demon with 9/16-24 threads -06AN inlet - Black | professional-products.com | 14.99 USD | 129.99 USD | −88.5% |
| Ford 4V 1999-2014 Single Ignition Coil | professional-products.com | 3.99 USD | 30.42 USD | −86.9% |
| Ford 5.0L Coyote 2011-2016 Ignition Coil Set of 8 | professional-products.com | 30 USD | 150 USD | −80% |
| Ford 3.5L V6 2010-2016 Ignition Coil Set of 6 | professional-products.com | 30 USD | 140 USD | −78.6% |
| Ford 4V 1966-2014 Ignition Coil Set of 8 30551 | professional-products.com | 30 USD | 130 USD | −76.9% |
| Ford 1998-2014 2V Ignition Coil Set of 8 | professional-products.com | 30 USD | 115 USD | −73.9% |
| Chrysler 2003-07 5.7L HEMI Ignition Coil Set of 8 | professional-products.com | 40 USD | 150 USD | −73.3% |
| Ford 3.0L/2.3L 4-Cyl. 2012-2019 Ignition Coil Set of 4 | professional-products.com | 30 USD | 110 USD | −72.7% |
| Chrysler 5.7L HEMI 2003-05 Single Ignition Coil | professional-products.com | 19.99 USD | 43.48 USD | −54% |
| Sani-System Water Softener Liquid Concentrate Sanitizer | water-softeners-filters.com | 4.94 USD | 141.65 USD | −45.4% |
| Sani-System Reverse Osmosis Liquid Concentrate Sanitizer | aquapurefilters.com | 5.66 USD | 127.45 USD | −37.3% |
| Sani-System Reverse Osmosis Liquid Concentrate Sanitizer | water-softeners-filters.com | 5.66 USD | 123.74 USD | −37.3% |
| Pro Products Deluxe Field Analysis Kit | water-softeners-filters.com | 246.35 USD | 365 USD | −32.5% |
| Pro Products Standard Sales Demonstration Kit | water-softeners-filters.com | 621.25 USD | 900.92 USD | −31% |
| Pro Products Water Test Kit (2401) | water-softeners-filters.com | 175.12 USD | 238 USD | −26.4% |
| Pro Products Basic Field Analysis Kit | water-softeners-filters.com | 169.8 USD | 229.6 USD | −26% |
| Pro Products Sani-System Clean & Sanitize Kit | water-softeners-filters.com | 25.47 USD | 33.32 USD | −23.6% |
| Potassium Permanganate 1.75 LBS (KP02N) | water-softeners-filters.com | 43.26 USD | 55.54 USD | −22.1% |
| NEUTRA SUL® Professional Grade Oxidizer - 1 Gallon | water-softeners-filters.com | 31.25 USD | 39.83 USD | −21.5% |
| Res Care Resin Cleaning Solution - 1 Qt. bottle / case of 12 RK32N | water-softeners-filters.com | 120.64 USD | 150.86 USD | −20% |
| Pro Rust Out Water Softener Rust Remover by Pro Products | waterfilters.net | 205.45 USD | — | — |
| Mag Ox Water Filtration Media | proproducts.com | 196.0 USD | — | — |
| Rid-O-Rust EXTREME Water Concentrated Formula (Four 64 oz Bottles) | affordablewater.us | 121.99 USD | — | — |
| Rescare Water Softener Cleaner (Four 1 Gallon Bottles) | affordablewater.us | 99.99 USD | — | — |
| PRO Wipeout Spray Gloss 5 Gal | wowotogo.com | 99.82 USD | — | — |
| Pro Products ResCare RK02B All-Purpose Water Softener Cleaner Liquid Refill, 1 Gallon, Pack of 4 | provizio.com | 87.55 USD | 0 USD | — |
| Neutrasul Professional Grade Oxidizer (5 Gallon Bucket) | affordablewater.us | 84.59 USD | — | — |
| Pro Products SANI-SYSTEM (SS24WS) Liquid Sanitizer Concentrate for WATER SOFTENE | filters4you.net | 77.99 USD | — | — |
| Rescare Water Softener Cleaner (Two 1 Gallon Bottles) | affordablewater.us | 55.99 USD | — | — |
| PRO GOLD | wowotogo.com | 55.56 USD | — | — |
| GreenFeeder Winterizing Service Plug | proproducts.com | 51.7 USD | — | — |
| PRO #1 Polish | wowotogo.com | 48.5 USD | — | — |
| Pro Products 2009 Hardness #3 Refill Solution (16 oz) | waterfilters.net | 45 USD | — | — |
| Pro Products GP10C Poly Guard Scale and Rust Preventer (1 Filter) | waterfilters.net | 42.71 USD | — | — |
| Rescare Water Softener Cleaner (Two (2) 64 oz Bottles) | affordablewater.us | 42 USD | — | — |
| Ban-T Alkaline Water Neutralizer and Tannin Remover (4 lb Bottle) | affordablewater.us | 33.99 USD | — | — |
| Rescare Water Softener Cleaner (1 Gallon Bottle) | affordablewater.us | 27.99 USD | — | — |
| Pro Products Neutra Sul HP41N Pro Grade Oxidizer (1 Bottle) | waterfilters.net | 27.96 USD | — | — |
| Rescare Water Softener Cleaner (64 oz Bottle) | affordablewater.us | 23.99 USD | — | — |