The Well Pro® Dry Pellet Chlorinator

The Smart Solution “Well Pro” Dry Pellet Chlorinator by H2O Chlorination, Inc.
Shop with CONFIDENCE at ESD ~ Your Abundantly Secure Order Gets Personal Attention


  • Kills bacteria at the wellhead source
  • Well water disinfection Eliminates “rotten egg” odor by eliminating sulfate-reducing bacteria
  • Reduces iron and manganese Reduces iron and manganese problems by oxidation/precipitation
  • Kills iron bacteria and sulfur reducing bacteria Kills iron bacteria that cause slime, pump and screen clogging, etc.
  • Kills fecal coliform and reduces total coliform bacteria Reliable, consistent dosing with less hassle and maintenance than liquid chlorinators
  • Oxidizes iron and sulfur Safe, easy loading of pre-packaged pellets — NO chemicals handling
  • Purifies and disinfects well water Rugged, weatherproof construction designed for stand-alone outdoor installation
  • Dry chlorine pellets Adjustable dosage rate to accommodate any disinfection requirement
  • Problem well solutions Water demand operation. Feeds pellets according to well pump kick-on and duration
  • Problem well solutions Offered in either 115V and 220V models to match your well pump voltage
  • Problem well solutions Covered by the manufacturer’s 18 month Limited Warranty

The first compact low-profile, dry pellet chlorinator for home well water needs. Foul-smelling, corrosive hydrogen sulfide. Sink-staining iron and manganese. Slime-causing, pump-clogging iron bacteria. These are unpleasant, and potentially costly, facts of life in many residential water wells.

Now, the Well PRO dry pellet chlorinator lets you control these problems at their source (in the well itself) with a compact, low-profile unit that blends comfortably into any home landscape. Designed specifically for residential use, the Well PRO chlorinator maintains your yard’s aesthetics.

The Well PRO chlorinator is constructed of rugged, matte-black thermoplastic to resist corrosion from chlorine or the weather and mounts directly over your well for minimum intrusion on your landscape design.


Safe, simple, fast loading with prepackaged Well PRO pellets  


The Well PRO chlorinator’s highly concentrated dry chlorine pellets come in easy-to-store, easy-to-handle 3 1/2-pound containers that actually serve as the chlorine hopper. Each new container is simply screwed right into the chlorinator to replenish the chlorine supply, so you never need to handle any chemicals directly. And there are no fumes or spills to worry about. After opening the Well PRO chlorinator’s protective cover, remove the power module and unscrew the cap from a full container of Well PRO pellets. Screw the power module directly onto the full pellet container. Insert the power module/pellet container assembly in the the Well PRO chlorinator protective housing and replace the cover.



Price ea.

WP-1 – With auto shut-off (115V)


WP-2 – Without auto shut-off (115V)


WP-3 – With auto shut-off (220V)


WP-4 – Without auto shut-off  (220V)


Spare / Replacement Parts, Supplies & Accessories

Pellets. Case of nine 3.5 lb. Jars = $11.43/lb. for 31.5 lbs.
Includes HazMat fee AND shipping.
Comparison shopping? Beware of hidden shipping costs.

Starter Case

Pellets. Case of Twenty 2.2 lb. Bags = $9.41/lb. for 44 lbs.
Includes shipping. NO Hazmat fee.
NOTE: The Empty 3.5 lb. or 2.2 lb. jars you need to use this product are NOT INCLUDED.


Need smaller lots of chlorine pellets?
We can now offer them in:

Nine 2.2 lb. jars (19.8 lbs.)

$256.00 ($12.93/lb.)

Six 2.2 lb. jars (13.2 lbs.)

$191.00 ($14.47/lb.)

Three 2.2 lb. jars (6.6 lbs.)

$132.00 ($20.00/lb.)

One 2.2 lb. jar

$62.00 ($28.18/lb.)

Power Module — Lightning does strike on occasion. If your Well Pro has been fried, chances are all you need to replace is the Power Module.

WP-1  WP-2  WP-3  WP-4


6 Hole Pellet Plate, PNR: 1032234


6 Hole Pellet Plate w/Plugs, PNR: 1032234P


Miscellaneous Parts and Assemblies
Please include Part Number/s (Link to Parts Manual)
Add to Shopping Cart on the
Miscellaneous Parts Order Form.

Typical Installation Scheme

Build your own system as depicted in the schematic above, or otherwise, and realize HUGE discounts when ordered as components to a multi-component system. Discounts apply only when combined with a Well PRO unit.

Be sure you’ve also selected which Well PRO unit you are
combining with any component in the table above
before clicking the “Add To Shopping Cart” button.



Price ea.

Add a 9″x48″ Filter w/ Auto Backwash Valve
$120.00 (10%) off current list price.


Add a US4 Undersink Polishing Filter
10% off already discounted list price.


Design simplicity ensures trouble-free performance

Designed specifically for outside installation, the Well PRO chlorinator’s rugged weatherproof construction ensures reliable, uninterrupted operation in any weather. Easy to install and easy to service if necessary, the Well PRO chlorinator features precision-tooled, injection-molded components, few moving parts and a full array of performance features.


  • The plug-in power module is completely encapsulated in polyurethane foam to protect it from chlorine corrosion and requires no routine servicing or maintenance.
  • The rugged drive motor turns on and off according to water demand to maintain a consistent chlorine residual in the water.
  • The adjustable dosage rate makes the Well PRO chlorinator adaptable to a wide range of water problems and water usage characteristics.
  • System operation based on water usage. The Well PRO chlorinator is energized only when the well pump operates. Chlorine consumption is minimized and chlorination efficiency is maximized.
  • An automatic shutoff device prevents overchlorination if the well pump remains on for an extended period.
  • To reduce pellet drop rate lower than system settings, see our pellet plate modification page.
Special Features Safety feature (WP1 and WP3): If the well pump runs for 15
continuous minutes the Well PRO will
shut off.
Pellet Feed Rate (Max) 3 pellets/minute
Pellet Storage (Max) 3-1/2 pounds
Shipping Dimensions 34 x 11 x 8 inches (86 x 28 x 20 cm)
Shipping Weight 15 pounds (6.8 kg)
Chlorine Pellets EPA registered: 50510-1
Active Ingredient: Calcium Hypochlorite (70% Available Chlorine)
Pellet Weight: 0.79g (0.28oz.)

One 3.5 lb. bottle of pellets should last approximately 4 weeks under normal operating conditions.

NOTE: these pellets are shaped and weighted to work with the Well Pro system only. Be sure that’s what you have before ordering pellets. Must ship as a HAZMAT. Shipping cost for non-warrantable returns of pellets and Well Pro units entirely at customer’s expense. Warrantable return shipping cost will be reimbursed. Returns subject to 10% restocking fee exept for warranty or shipping damage claims.



In nearly all circumstances, it is advisable to consider doing a “shock treatment” on a well that has never been chlorinated or on a system you know needs disinfected. The Well Pro will do an excellent job of chlorinating at a “maintenance” level, but there is a better (and cheaper) way to go about performing a shock chlorination of your system than by using these dry chlorine pellets. As a courtesy, we have copied part of a university agricultural extension office’s instructions on how to do a shock chlorination on your well and household plumbing using ordinary household bleach. Click HERE to read those detailed instructions. [We’ll open that link in a separate browser window so you don’t lose your place here.]


Here is the “Installation, Operation and Maintenance Manual” in .pdf format.

Shipping turn-around time between order and delivery is right at one week to most points in the USA. If shipment includes chlorine pellets, which must ship as a “hazmat,” that can cause some delay on the part of the carrier. We have no control over carrier (UPS) schedules.

Need well water testing? We wholeheartedly recommend the economical and excellent lab work done by our friends at