Everbilt 1/2 in. Barb x 3/8 in. MIP Nylon Adapter Fitting 800219 - The Home Depot
Plastic Barb Fittings - 3/8" x 1/4" Red. Splicers Polyethylene
Stepped Tubing Connector 3/8" to 1/2" 12-Pack - Goldleaf Scientific
Buy Anderson Metals Push-in Plastic Connector 3/8 In. X 1/8 In. MPT
Amazon.com: JoyTube Plastic Hose Barb Reducer Pipe fittings, 3/8" to 3/16" Hose ID Connectors Joint Splicer Mender Adapter Union Boat Water Air Aquarium O2 Fuel (Pack of 3 ) : Industrial & Scientific
Everbilt 3/8 in. Compression Sleeves and Brass Insert Fittings (2-Pack) 800579 - The Home Depot
1/8" COMPRESSION TUBING UNION
Qest Ring for Compression Fittings - 3/8" ID Tubing - Fittings & Adapters - Pumps, Plumbing & Sanitation - Boat Systems
Amazon.com: PureSec Tubing 3/8 Inch Blue RODI Tubing Polypropylene 16 Feet Push to Connect Fitting Kit for RODI System(Plastic Tubing+Ball Valve+Tee+Y+L+I+Tubing Cutter DIY Package) : Industrial & Scientific
Watts Quick Connect 1/2 in. x 3/8 in. Plastic 90-Degree OD x MPT Elbow PL-3038 - The Home Depot
Straight tube to tube fittings - CPC FitQuik
10 PC Tube OD 10mm 3/8'' Elbow Union Pneumatic Quick Connector Air Fittings Pus | eBay
Amazon.com: LASCO 19-6183 Push-in Fitting with 3/8-Inch OD Tube and 1/4-Inch Compression Female Thread, Plastic : Industrial & Scientific
Proline Series 3/8-in x 3/8-in Barbed Tee Fitting in the Brass Fittings department at Lowes.com
Reducer Tubing Fittings, Polyethylene, 5/8" x 3/8" Hose Barb, pack/100
1/8" NPT to 3/8" hose barb plastic elbow fitting TSD933-8
Amazon.com: Quickun 3/8" Hose Barb T Shaped Tee Type 3 Way Equal Barbed Fitting Plastic Joint Splicer Mender Union Adapter for Air Line Tube Hose (Pack of 5) : Industrial & Scientific