Fernco TST-4 Flexible Tap Saddle – 4" PVC Sewer Main Saddle for Tee Connections, Soil-Tight & Water-Tight up to 10 PSI

Part # TST-4

Durable, jobsite-ready materials. Manufactured from high-durometer PVC with corrosion-resistant stainless steel clamps for strength, flexibility, and...
Simple slip-lock design. Engineered for quick installation with a slip-lock clamp system—no messy primers, glues, or specialty tools required.
Versatile fit. Designed for 4" lateral connections on sewer mains 6" and larger.
Specs and codes. Conforms to ASTM d5926 and meets AIS (american iron and steel) compliance standards.

TST Series Size: 4"

Connects Cast Iron and Plastic

Drawing (PDF) All documents

Dimensions

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Length	6.63 in
Width	3.87 in
Height	7.30 in
Weight	3.87 lb

Product details

Make fast, reliable sewer main connections without the cost and complexity of traditional methods. The Fernco TST-4 flexible tap saddle delivers a secure, soil-tight seal with the option for water-tight performance up to 10 PSI when paired with a pressure kit. Designed for 4" lateral connections on 6" and larger sewer mains, this saddle installs quickly with a slip-lock clamp system—no special tools, primers, or adhesives required. Built from high-durometer PVC and stainless steel clamps, it’s a dependable solution for long-lasting underground performance.

Fast, cost-effective installation. Eliminates the need for cutting in tees or wyes—reducing labor time, equipment needs, and overall installation cost while still delivering a secure connection.

Secure, reliable seal. Provides a soil-tight connection standard, with the ability to achieve a water-tight seal up to 10 PSI when used with a Fernco pressure kit—giving you flexibility based on job requirements.

Made in the USA, built to perform. Proudly manufactured in the USA and built to meet demanding jobsite conditions, delivering consistent performance contractors can trust.