Model K-300

Our most versatile solution yet, the K-300 condensate neutralizer is designed to neutralize the acidic condensate produced by high-efficiency, gas-fired appliances and is rated for 2.4 GPH of condensate (approximately 300-400 MBH).

K-300 Download Center

K-Series Sell Sheet

K-Series I & O Manual

K-300 Product Drawing

K-300 Technical Info

Our latest innovation, the K-Series condensate neutralizers are ideal for most residential and commercial condensing appliance installations. The K-Series blends industrial strength with a lightweight and compact inline tube design.

Purpose-built for the heating and plumbing industries, K-Series condensate neutralizers are equipped with the lowest inlet on the market and an installation kit with the flexibility to install with hard-pipe or poly tubing. JJM®’s proprietary end-cap design enables fast and easy maintenance during routine replacement of our pH Power Pellets® media, reducing downtime and service hours.

Model K-300 Benefits
  • The lowest inlet on the market, ideal for residential or light commercial condensing installations.
  • Flexible installation options to connect with both hard-pipe or poly tubing.
  • Proprietary end-cap design ensures quick and easy routine maintenance in the field.

The Model K-300 condensate neutralizer is well-suited for most residential installations of high-efficiency, gas-fired appliances. It is great for treating boilers, furnaces, and tankless hot water heater condensate that are rated approximately 300-400 MBH.



The effects of untreated acidic condensate can develop quickly, corroding copper, iron pipes, or floor drains in a matter of months, not years. Fortunately, condensate neutralizers are relatively inexpensive, and they can save property owners from expensive damage.

JJM® condensate neutralizers are quick and easy to install, at the initial installation or during annual maintenance of the high-efficiency, gas-fired appliance. Neutralizers should be installed by a licensed, trained Installer or Service Technician.

Sizing a Neutralizer

Model K-300 Specifications

Part #5101


Flow Rate

Inlet Port

Outlet Port


pH Power Pellets Refill


2.4 GPH



Wall or Floor

K-300R part #6101

JJM® condensate neutralizers must be routinely serviced to remain effective. Once a year, Service Technicians should inspect the neutralizer and replace the JJM® pH Power Pellets® (neutralizing media) to ensure continued protection and code compliance.

When you register a JJM® condensate neutralizer, the neutralizer will be under warranty against defects in materials and workmanship for one year. The warranty does not cover the issues that result from misuse, improper installation, and/or failure to replace the pH Power Pellets® as instructed.