1/4" x 1/8"
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Buttress Thread vs Acme Thread Comparison
Buttress Threads provide superior sealing and higher burst ratings than the Acme Threads found on most housings. Because of this, Pentek introduced their line of 3G Housings that feature buttress threads. We also carry housings from Watts/Flowmatic & Kemflo that utilize buttress threads.
Buttress Thread Design
Acme Thread Design
Buttress Thread Design
Acme Thread Design
Everpure QL3 Head
Everpure systems include a .5 GPM flow restrictor fitting that should be installed in the outlet port of the head. The fitting limits the flow of water that can go through the filter to .5 GPM.
To increase the flow to 1 GPM to match the flow rate of the MAF Cartridge, the .5 GPM fitting must be replaced with a 1 GPM fitting. The MAF cartridge will work with the .5 GPM flow restrictor, but the flow will be limited to .5 GPM. It is only necessary to replace this fitting if you desire an increase in your flow rate.
It is possible that the flow restrictor may be installed on the inlet port, however this is not recommended. If upon removing the fitting from the outlet, if it is not found to have a flow restrictor in the fitting (usually stainless steel), remove the inlet fitting and see if the flow restrictor was installed on the inlet side.
It is recommended that the flow restrictor be installed on the outlet port to prevent the small opening from becoming clogged with sediment from the untreated water.
QL3 Head with Flow Restrictor Fitting
John Guest Quick-Connect Instructions
Download Quick-Connect Instructions
Requires Adobe Acrobat Reader
Step 1 – Insert Tube
Fitting grips before it seals. Ensure tube is pushed into the tube stop.
Step 2 – Push Up to Tube Stop
Push the tube into the fitting, to the tube stop. The collet (gripper) has stainless steel teeth which hold the tube firmly in position while the O-ring provides a permanent leak-proof seal.
Step 3 – Pull To Check if Secure
Pull on the tube to check that it is secure. It is a good practice to test the system prior to leaving site and/or before use.
Step 4 – Disconnecting
To disconnect, ensure the system is depressurized before removing the tube. Push in collet squarely against face of fitting. With the collet held in this position, the tube can be removed. The fitting can then be re-used.
John Guest Fittings, Valves & Tubing
John Guest quick connect fittings connect and disconnect without tools and never leak. Tough as nails NSF Certified and ISO 9001 Certified. These fittings are trusted the world over. John Guest fittings, ball valves and tubing are the best components for a water tight seal every time.
View all John Guest Products How To Use Quick-Connect
John Guest Fittings
JG fittings are available in sizes from 1/8″ to 1/2″ for a full spectrum of reliable tubing connections.
John Guest Tubing
JG tubing is 230 psi rated flexible plastic tubing. This tubing is tough. Much more flexible than copper, it will probably last forever!
John Guest Valves
JG ball valves make shutting off water easy for anyone. Just a quick turn and it’s off!
John Guest Quick-Connect
John Guest is the originator of Quick-Connect Fitting Technology and the world leader. John Guest Fittings, Valves & Tubing are produced in the UK to exacting quality standards that are second to none!
Made in the United States of America
H2O Distributors is proud to feature American-made products on our website.
Quick-Connect Instructions
Download Quick-Connect Instructions
Requires Adobe Acrobat Reader
Step 1 – Insert Tube
Fitting grips before it seals. Ensure tube is pushed into the tube stop.
Step 2 – Push Up to Tube Stop
Push the tube into the fitting, to the tube stop. The collet (gripper) has stainless steel teeth which hold the tube firmly in position while the O-ring provides a permanent leak-proof seal.
Step 3 – Pull To Check if Secure
Pull on the tube to check that it is secure. It is a good practice to test the system prior to leaving site and/or before use.
Step 4 – Disconnecting
To disconnect, ensure the system is depressurized before removing the tube. Push in collet squarely against face of fitting. With the collet held in this position, the tube can be removed. The fitting can then be re-used.
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