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5100 Series Low Spill Connect Under Pressure Quick Disconnect, Female Half, -20 Coupling, 1-1/4-11-1/2 Female Pipe

Description & Features

The 5100 Series Low Spill Connect Under Pressure Quick Disconnect, Female Half, -20 Coupling, 1-1/4-11-1/2 Female Pipe is designed for seamless fluid transfer and hydraulic applications. The tubular valve construction ensures minimal fluid loss during disconnection, reducing environmental and safety hazards.

Featuring low air inclusion during connection, it maintains optimal system performance. This coupling allows connecting of halves even when pressurizing up to 500 psi, making it suitable for on-highway hydraulic wet lines, dump and refuse vehicles, and bulk liquid transfer.

Constructed with standard body material of brass and steel valving components, it is available with wing or hex nut configurations. The standard seal material is Buna-N, providing reliable sealing under various conditions. A steel flange is available for accessible bulkhead mounting.

Supplier Part Number: 5100-S5-20B Catalog Number: C1BS62

Specifications

Brand Danfoss	Connection Size 1 1-1/4 in	Connection Size 2 1-1/4 in	Connection Type FNPT	Connection Type 1 Female NPT	Connection Type 2 Female NPT	Dimensions 5.27 in L x 4 in H	Finish Zinc Trivalent	Fitting Type Coupling	Fluid Compatibility Hydraulic Fluids	Latch Type Screw-to-Connect	Material Brass	Material Construction Brass	Operating Temperature -40 to 250 deg F	Seal Material NBR	Series 5100 Series	Thread Size 1-1/4-11-1/2	Valve Type 2-Way

Similar Products

Model Number	Coupling Size	Thread Size	Seal Material	A	B
5100-S5-12B 5100 Series Quick Disconnect	-12	3/4-14	Buna-N	3.09	4.06
5100-S5-10B 5100 Series Quick Disconnect	-10	1/2-14	Buna-N	3.09	4.06
5100-S5-16B 5100 Series Quick Disconnect	-16	1-11-1/2	Buna-N	3.67	4.38
5100-S5-24B 5100 Series Quick Disconnect	-24	1-1/2-11-1/2	Buna-N	4.02	5.31

Product Questions & Answers (4)

Question by: Harvey T on Aug 22, 2025, 6:07 PM

reckon this quick disconnect would work on my dump truck's wet line setup?

Answer by: Customer Support on Aug 24, 2025, 3:53 PM

This Eaton 5100 series quick disconnect is often used for on-highway hydraulic wet lines, along with dump and refuse vehicles.

Question by: Ralph M on Mar 25, 2025, 7:01 AM

does this thing connect when there's already pressure in the line, or do you have to bleed it down first before hooking up?

Answer by: Customer Support on Mar 26, 2025, 7:06 PM

You can connect it under pressure up to 500 psi without bleeding the line down first. That's one of the main reasons this fitting gets used on dump trucks and refuse trucks where stopping to depressurize the system every time just isn't practical. The tubular valve construction also keeps fluid loss down to around 0.70 cubic centimeters at disconnect, so you're not making a mess every time you pull it apart.

Question by: Dale L on Feb 2, 2026, 1:02 PM

got a wet line setup on a dump trailer, is this the right female quick disconnect for that kind of work?

Answer by: Customer Support on Feb 4, 2026, 6:04 AM

For on highway hydraulic wet lines and equipment like dump and refuse vehicles, the 5100 Series female half is a common fit since it is built for hydraulics and fluid transfer in those applications, with a low spill tubular valve style.

Question by: Randy C on May 28, 2025, 7:28 PM

trying to swap out an old wet line coupler, what thread is on this female half?

Answer by: Customer Support on May 30, 2025, 11:10 AM

The female pipe thread on this -20 female half is 1-1/4-11-1/2, and it’s a 2-way valve style quick disconnect.

5100 Series Low Spill Connect Under Pressure Quick Disconnect, Female Half, -20 Coupling, 1-1/4-11-1/2 Female Pipe

Description & Features

Specifications

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Product Questions & Answers (4)