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 1/4 Inch Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV040808WP

Product ID: 1097480

Details

Brand
John Guest
Color
Blue/White
Connector Type
Quick-Connect
Exterior Finish
Copper
Item Weight
0.27 g
Item dimensions L x W x H
0.5 x 1.5 x 2

💧Food-grade EPDM O-rings

🔧Tool-free twist-and-lock install

⚙️150 PSI max pressure

16531CFA

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Sold byAmazon SenegalDelivered 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—perfect for your health-conscious projects.
PRESSURE TESTED - Rated for 150 PSI at 70°F and 60 PSI at 140°F—reliable under pressure, literally.
PRO APPROVED QUALITY - Preferred by professionals for permanent, hassle-free shut-off solutions.
EFFORTLESS INSTALLATION - Push-to-connect design means no tools, glue, or soldering—get it done in seconds.

The John Guest Speedfit 1/4 Inch Shut Off Valve is a high-quality, food-safe polypropylene plumbing fitting featuring push-to-connect technology for quick, tool-free installation. Certified for potable water use and rated up to 150 PSI, it offers durable, leak-free performance ideal for behind-the-wall applications and hydronic heating systems.

Specifications

ASIN	B003YKF2E2
Best Sellers Rank	#9,485 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #305 in Pipe Fittings
Brand Name	John Guest
Color	Blue/White
Connector Type	Quick-Connect
Customer Reviews	4.7 4.7 out of 5 stars (1,320)
Exterior Finish	Copper
Global Trade Identification Number	00665626110672, 00665626120312
Included Components	Valve
Item Dimensions	0.5 x 1.5 x 2 inches
Item Type Name	Plastic Push Shut Off Valve
Item Weight	0.27 g
Manufacturer	Cash Acme
Manufacturer Part Number	PPSV040808WP
Manufacturer Warranty Description	12 Months against workmanship or material defects. Product replacement
Material Type	Polypropylene
Model Number	PPSV040808WP
Number of Pieces	1
Size	1/4 in. Tube OD
Thread Type	NPT
UPC	726670193995 665626164996 784497761803 665626076015 665626120329 673090267594 665626120312 665626110672
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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16531CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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