Products
Showing 1–100 of 198 results
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1″ x 3/4″ John Guest CTS Connector (OD) to Reduce Union (Black Polypropylene)
$15.90 - $16.20 -

John Guest 1″ CTS (OD) Straight Union Connector (Black Polypropylene)
$9.70 - $10.00 -

John Guest 1″ CTS Union Elbow (Black Polypropylene)
$12.00 -

John Guest 1″ CTS x 1″ NPT Male Connector (Black Polypropylene)
$12.00 - $13.00 -

John Guest 1″ x 1″ x 1″ CTS Union Tee (White Polypropylene, Case Only)
$12.00 - $12.60 -

John Guest 1″ x 1″ x 3/4″ CTS Reducing Branch Tee (White Polypropylene)
$8.70 - $9.00 -

John Guest 1″ x 3/4″ CTS Reducer (White Polypropylene)
$5.50 -

John Guest 1/2″ (OD) Straight Union Connector (Acetal)
$2.60 - $2.75 -

John Guest 1/2″ Locking Clip
$0.30 - $0.33 -

John Guest 1/2″ Plug
$1.10 - $1.30 -

John Guest 1/2″ Union Elbow (Acetal)
$3.10 - $3.40 -

John Guest 1/2″ x 1/2″ NPTF Male Connector (Acetal)
$2.90 - $3.30 -

John Guest 1/2″ x 1/2″ Straight Ball Valve
$7.00 - $8.50 -

John Guest 1/2″ x 1/2″ x 1/2″ Union Tee (Acetal)
$3.30 - $3.60 -

John Guest 1/2″ x 1/2″ x 1/2″ Union Tee (White Polypropylene)
$3.20 - $3.50 -

John Guest 1/2″ x 1/2″ x 3/8″ Reducing Branch Tee (Acetal)
$3.70 - $4.10 -

John Guest 1/2″ x 3/8″ NPTF Male Connector (White Polypropylene)
$2.50 - $2.80 -

John Guest 1/2″ x 3/8″ Reducing Union (Acetal)
$2.85 - $3.15 -

John Guest 1/4 Tube to 1/4 Hose Stem (Acetal)
$1.20 - $1.40 -

John Guest 1/4″ (OD) Straight Union Connector (Acetal)
$1.90 - $2.10 -

John Guest 1/4″ (OD) Straight Union Connector (White Polypropylene)
$1.60 - $1.80 -

John Guest 1/4″ End Stop
$1.05 - $1.25 -

John Guest 1/4″ FNPT x 1/4″ OD Female Adaptor
$3.15 - $3.55 -

John Guest 1/4″ JG x 3/8″ NPTF Male Connector with 0.5 GPM Flow Restrictor
$12.00 - $15.00 -

John Guest 1/4″ JG x 3/8″ NPTF Male Connector with 1 GPM Flow Restrictor
$12.00 - $15.00 -

John Guest 1/4″ JG x 7/16″ Faucet Connector
$2.10 - $2.30 -

John Guest 1/4″ Locking Clip
$0.27 - $0.30 -

John Guest 1/4″ OD x 1/4″ NPTF Fixed Elbow (Acetal)
$1.90 - $2.10 -

John Guest 1/4″ OD x 1/4″ NPTF Fixed Elbow (White Polypropylene)
$1.80 - $2.00 -

John Guest 1/4″ OD x 1/8″ NPTF Fixed Elbow (Acetal)
$1.75 - $1.95 -

John Guest 1/4″ OD x 1/8″ NPTF Fixed Elbow (White Polypropylene)
$1.60 - $1.80 -

John Guest 1/4″ OD x 3/8″ NPTF Fixed Elbow (Acetal)
$2.20 - $2.40 -

John Guest 1/4″ OD x 3/8″ NPTF Fixed Elbow (White Polypropylene)
$2.05 - $2.30 -

John Guest 1/4″ Plug
$0.54 - $0.65 -

John Guest 1/4″ Tube x 1/4″ NPTF Stem Adaptor (Acetal)
$0.64 - $0.75 -

John Guest 1/4″ Tube x 1/4″ NPTF Stem Adaptor (Bag Only)
$7.38 - $7.50 -

John Guest 1/4″ Union Elbow (Acetal)
$1.90 - $2.10 -

John Guest 1/4″ Union Elbow (White Polypropylene)
$1.75 - $1.95 -

John Guest 1/4″ x 1/4″ Bulkhead Union (Acetal)
$2.80 - $3.45 -

John Guest 1/4″ x 1/4″ Bulkhead Union (Polypropylene)
$3.35 -

John Guest 1/4″ x 1/4″ NPTF Male Connector (Acetal)
$1.40 - $1.60 -

John Guest 1/4″ x 1/4″ NPTF Male Connector (White Polypropylene)
$1.15 - $1.35 -

John Guest 1/4″ x 1/4″ NPTF Male Valve
$4.50 - $6.00 -

John Guest 1/4″ x 1/4″ Plug-In Elbow (Acetal)
$1.75 - $1.95 -

John Guest 1/4″ x 1/4″ Plug-In Elbow (White Polypropylene)
$1.65 - $1.85 -

John Guest 1/4″ x 1/4″ Straight Ball Valve
$4.50 - $6.00 Top Seller -

John Guest 1/4″ x 1/4″ x 1/4″ Union Tee (Acetal)
$2.30 - $2.50 -

John Guest 1/4″ x 1/4″ x 1/4″ Union Tee (White Polypropylene)
$2.20 - $2.40 -

John Guest 1/4″ x 1/8″ NPTF Male Connector (White Polypropylene)
$1.10 - $1.30 -

John Guest 1/4″ x 3/8″ NPTF Male Connector (Acetal)
$1.80 - $1.95 -

John Guest 1/4″ x 3/8″ NPTF Male Connector (White Polypropylene)
$1.65 - $1.85 -

John Guest 3/4″ CTS (OD) Straight Union Connector (Black Polypropylene)
$5.70 - $6.00 -

John Guest 3/4″ CTS Union Elbow (Black Polypropylene)
$6.45 -

3/4″ CTS x 1″ John Guest NPT Male Connector (Black Polypropylene)
$6.60 - $7.80 -

John Guest 3/4″ CTS x 3/4″ NPT Female Connector
$10.00 - $10.50 -

John Guest 3/4″ CTS x 3/4″ NPT Male Connector (Black Polypropylene)
$6.00 - $7.00 -

John Guest 3/4″ CTS x 3/4″ Plug-In Elbow (White Polypropylene) (Sold in Packs of 5)
$20.00 -

John Guest 3/4″ x 1/2″ CTS Reducer (White Polypropylene)
$7.00 -

John Guest 3/4″ x 3/4″ CTS Straight Ball Shut-off Valve
$16.25 - $17.00 -

John Guest 3/4″ x 3/4″ x 3/4″ CTS Union Tee (Black Polypropylene)
$8.00 - $8.30 -

John Guest 3/8″ (OD) Equal Cross Connector
$5.25 - $6.00 -

John Guest 3/8″ (OD) Straight Union Connector (Acetal)
$2.20 - $2.40 -

John Guest 3/8″ (OD) Straight Union Connector (White Polypropylene)
$2.10 - $2.30 -

John Guest 3/8″ End Stop
$1.30 - $1.50 -

John Guest 3/8″ JG x 7/16″ Faucet Connector
$2.20 - $2.50 -

John Guest 3/8″ Locking Clip
$0.30 - $0.33 -

John Guest 3/8″ OD x 1/4″ NPTF Fixed Elbow (Acetal)
$2.60 - $2.90 -

John Guest 3/8″ OD x 1/4″ NPTF Fixed Elbow (White Polypropylene)
$2.35 - $2.55 -

John Guest 3/8″ OD x 3/8″ NPTF Fixed Elbow (Acetal)
$2.80 - $3.10 -

John Guest 3/8″ OD x 3/8″ NPTF Fixed Elbow (White Polypropylene)
$2.40 - $2.60 -

John Guest 3/8″ Plug
$0.80 - $0.95 -

John Guest 3/8″ Stem OD x 1/4″ Tube OD JG Reducer
$1.75 - $1.95 -

John Guest 3/8″ Tube x 1/4″ NPTF Stem Adaptor
$0.78 - $0.90 -

John Guest 3/8″ Tube x 1/4″ NPTF Stem Adaptor (Acetal)
$0.73 - $0.85 -

John Guest 3/8″ Tube x 3/8″ NPTF Stem Adaptor
$1.00 - $1.15 -

John Guest 3/8″ Union Elbow (Acetal)
$2.70 - $2.90 -

John Guest 3/8″ Union Elbow (White Polypropylene)
$2.65 - $2.85 -

John Guest 3/8″ x 1/2″ NPTF Male Connector (Acetal)
$2.95 - $3.30 -

John Guest 3/8″ x 1/4″ NPTF Male Connector (Acetal)
$1.95 - $2.15 -

John Guest 3/8″ x 1/4″ NPTF Male Connector (White Polypropylene)
$1.90 - $2.05 -

John Guest 3/8″ x 1/4″ Plug-In Elbow (White Polypropylene)
$2.10 - $2.30 -

John Guest 3/8″ x 1/4″ Reducing Elbow (Acetal)
$2.80 - $3.20 -

John Guest 3/8″ x 1/4″ Reducing Union (Acetal)
$2.20 - $2.40 -

John Guest 3/8″ x 1/4″ Reducing Union (Polypropylene)
$2.10 - $2.30 -

John Guest 3/8″ x 3/8″ Bulkhead Union (Acetal)
$3.90 - $4.25 -

John Guest 3/8″ x 3/8″ Bulkhead Union (Polypropylene)
$3.70 - $4.10 -

John Guest 3/8″ x 3/8″ NPTF Male Connector (Acetal)
$2.00 - $2.30 -

John Guest 3/8″ x 3/8″ NPTF Male Connector (White Polypropylene)
$1.90 - $2.10 -

John Guest 3/8″ x 3/8″ NPTF Male Valve
$5.00 - $6.50 -

John Guest 3/8″ x 3/8″ Plug-In Elbow (White Polypropylene)
$2.60 - $2.80 -

John Guest 3/8″ x 3/8″ Straight Ball Valve
$5.00 - $6.50 -

John Guest 3/8″ x 3/8″ x 1/4″ Reducing Branch Tee (Acetal)
$3.55 - $3.95 -

John Guest 3/8″ x 3/8″ x 1/4″ Reducing Branch Flow Tee (White Polypropylene)
$3.55 - $3.95 -

John Guest 3/8″ x 3/8″ x 3/8″ Union Tee (White Polypropylene)
$3.00 - $3.75 -

John Guest 3/8″ x 3/8″ x 3/8″ Union Tee (Acetal)
$2.70 - $3.00 -

John Guest 3/8″ x 5/16″ Reducing Union (Acetal)
$2.20 - $2.40 -

John Guest 3/8″ x 7/16″ Polypropylene White Faucet Connector
$2.20 - $2.50 -

John Guest Angle Stop Adaptor Valve – Lead Free 3/8″ Male Compression x 3/8″ Female Compression x 1/4″ Tube
$10.50 - $12.00 Top Seller -

John Guest Angle Stop Adaptor Valve – Lead Free 3/8″ Male Compression x 3/8″ Female Compression x 3/8″ Tube
$11.00 - $12.50 -

John Guest Angle Stop Adaptor Valve with 1/2″ or 3/8″ Male Compression x 1/2″ or 3/8″ Female Compression x 1/4″ Quick-Connect Tube – Lead Free
$17.50 - $19.00
H2O Distributors makes it easy to shop for water filtration systems, replacement filters, and essential components in one place. Whether you are improving the taste and odor of city water, addressing sediment in well water, adding UV disinfection, or replacing an overdue filter, you will find options built for real-world installations and straightforward maintenance.
This page serves as your starting point to quickly narrow down what you need. If you already know the part number or system type, jump to the closest category. If you’re unsure, use the “Start here” chooser below to select the right direction based on your water source, desired filtration location, and the issue you are trying to address.
Start with your water source and goal, then shop the category that fits and get the right system or replacement parts on the first try.
Start Here: Choose the Right Water Filtration Solution
- What is your water source?
- City water: Often focused on chlorine taste and odor, sediment, and better drinking water quality.
- Well water: Often focused on sediment, iron staining, odors, and microbial protection with UV.
- Where do you need water filtration?
- Whole house (point-of-entry): Filters water for the entire home, including showers and laundry.
- Under Sink (point-of-use): Filters water at a single faucet, typically for drinking and cooking purposes.
- What do you want to improve about your water?
- Taste and odor: Commonly addressed with carbon filtration. Shop for carbon filters.
- Bacteria and microorganisms: Addressed with UV disinfection, typically paired with prefiltration. Shop for ultraviolet sterilization.
Popular Water Filtration Needs
- Improves water quality at every tap
- Ideal for homeowners who want a single solution that supports showers, laundry, and appliances
- Point-of-use filtration for drinking and cooking water
- A great option when you want improved water at one location without having to filter the entire home
- Multi-stage drinking water filtration with a dedicated faucet
- Popular for households that want a higher level of purification for drinking, cooking, and ice
Ultraviolet Sterilizer Systems
- Provides a robust layer of microbial protection through disinfection
- Particularly useful for well water
- Commonly installed after sediment filtration, so the UV system can perform effectively
Cartridges and Replacement Filters
- For routine maintenance and performance
- Ideal for repeat purchases and maintaining existing systems at optimal performance
Valves, Tanks, Housings, and Parts
- Essential components that support installation, repairs, and upgrades
- Helpful in matching compatibility when replacing a specific part or rebuilding a system
FAQs About Our Water Filtration Products
Q: What is the difference between whole house and under-sink filtration?
A: Whole house filtration treats water throughout the home. Under-sink filtration treats drinking and cooking water at one faucet.
Q: Should I choose reverse osmosis or a standard under-sink filter?
A: Choose reverse osmosis if you want multi-stage drinking water filtration. Choose a standard under-sink filter if you prefer simpler, targeted filtration at a single faucet.
Q: Do I need UV if I already have a filter?
A: UV is for disinfection and is most common for well water or microbial concerns. It is often paired with filtration, not used as a replacement for it.
Q: How do I know which replacement filter or UV lamp I need?
A: Match the model number or part number from your current system or filter. If you are unsure, please confirm compatibility before placing your order.
Q: Will filtration reduce my water pressure?
A: It can if a system is undersized or a filter is clogged. Proper sizing and on-time replacement help maintain good flow.
Need more help?
Contact our team of water filtration experts, who will help you find the perfect filtration products for your space and needs.





































































































