Does a fitting size refer to inside or outside diameter?

It depends on the fitting. The MINI Quick Connect is listed for hose with a 5 mm inside diameter. The abc push-to-fit tee is listed for 5/16-inch outside-diameter tubing. Read the measurement convention before matching either to a hose.

Do I need a union, tee, or quick connect?

A straight union joins a line; a tee provides a branch; a quick connect allows a connection to be separated. Select the arrangement required by your equipment's plumbing. Confirm every port size on reducers and branching fittings rather than assuming all openings match.

Will any quick-connect halves work together?

No. Match the male and female parts by connector system and size. Similar-looking couplers can use different locking and sealing arrangements. Check whether a listing includes both halves or only a replacement component, and identify the existing part before ordering.

Where should I use a shut-off?

Choose a shut-off specified for the location and hose connection in your setup. Check the system's operating instructions before closing flow against a pump. A valve does not change the pressure rating of the rest of the equipment or replace any required pressure control.

How should I prepare for a replacement?

Record the system model, hose dimensions, fitting markings, and a clear view of both ends. Follow the manufacturer's procedure to isolate pressure before working on connections. Use the specified tubing preparation and sealing method; do not force a fitting that does not seat correctly.

What else should I check before ordering?

Confirm material, operating limits, and package quantity. Check seals and tubing ends if a connection leaks instead of assuming the fitting alone is the cause. Compare replacement hose and tubing if the line is damaged, or goosenecks and angle adapters for the brush-to-pole connection.

Need help matching your equipment? Call abc at 1-800-989-4003 with your system model, existing parts, and job requirements.