How do you install it to get it watertight? Looked for youtube videos - no luck!

The fitting itself is watertight. If its not, its defective. Once you push the pipe into this fitting you will feel it "pop" or "slip" into the seat where it becomes watertight. If its sitting right, you should not be able to pull this pipe out, nor should there be any leakage from it.

Can you control the speed of water flow through this valve?

I don't see why not. For my use, it's only open or closed. You would actually be controlling the amount of flow not the speed.

Does this value have or require a california proposition 65 warning for california residents? thanks!

Prop65 applies to any material, the warning is required even if a trace amount of over 1000 substances from the Prop65 list maybe present. We have the warning on our bags to comply with the requirement of the Prop65 regulation for “clear and reasonable” warning.

Does this work with 1/4 in drip irrigation tubing?

I used it with a 1/4" pex line for a fridge filter not totally sure about the irrigation line, you can try it out for a test before installing to be sure. A good sharp tubing cutter will help for a better seal and fit. Good Luck

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John Guest Speedfit 3/8 Inch OD Straight Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV041212WP

Product ID: 280022204

Details

Brand
John Guest
Colour
White
Item dimensions L x W x H
8 x 4 x 15
Material
polyprolylene
Size
3/8 in. Tube

💧Food-grade EPDM O-rings

⚙️150 PSI max pressure

🛠️Tool-free twist-and-lock install

R927

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚰 Twist, Connect, Done — Plumbing Made Effortless!

BUILT TO LAST - Durable polypropylene body with chemical resistance ensures leak-free performance behind walls.
CERTIFIED SAFE - NSF 61 & 51 certified for potable water—trusted for your home and health.
PRESSURE TESTED - Handles up to 150 PSI at 70°F, perfect for demanding plumbing setups.
PRO GRADE RELIABILITY - Preferred by professionals for permanent, secure shut-off in residential and commercial projects.
EFFORTLESS INSTALLATION - Push-to-connect design means no tools, glue, or soldering—get it done in seconds.

The John Guest Speedfit 3/8 Inch OD Straight Shut Off Valve is a high-quality, food-safe polypropylene plumbing fitting featuring push-to-connect technology for quick, tool-free installation. Rated for 150 PSI at 70°F and certified NSF 61 & 51, it ensures durable, leak-free shut-off for potable water and hydronic systems, making it a trusted choice for professional and DIY plumbing projects.

Specifications

ASIN	B003YKF2F6
ASIN	B003YKF2F6
Best Sellers Rank	#126,633 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,004 in Industrial Pipe Fittings
Brand Name	John Guest
Color	White
Connector Type	3/8OD x 3/8OD STRGHT VLV
Customer Reviews	4.7 4.7 out of 5 stars (441)
Customer reviews	4.7 4.7 out of 5 stars (441)
Date First Available	5 September 2012
Exterior Finish	Plastic
Global Trade Identification Number	00665626120381
Included Components	Valve
Is Discontinued By Manufacturer	No
Item Dimensions	8 x 4 x 15 centimeters
Item Type Name	Plastic Push Shut Off Valve
Item Weight	29 Grams
Item model number	PPSV041212WP
Manufacturer	Reliance Worldwide Corporation
Manufacturer	Reliance Worldwide Corporation
Manufacturer Part Number	PPSV041212WP
Material Type	polyprolylene
Model Number	PPSV041212WP
Number of Packs	1
Number of Pieces	1
Product Dimensions	8 x 4 x 15 cm; 29 g
Size	3/8 in. Tube OD
Thread Size	0.375 inch
Thread Type	NPTF
UPC	665626120381
Unit Count	1 Count

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