Best Spring Brake Control Valve for Trailer Air-Brake Systems

#1 · Best Overall

1. Lnkvorx 110500

• Size: 110500
• Thread Size: 3/8", "1/2

Best for: Single-Reservoir Trailer Replacement.

Why it ranks #1: Lists four NPT port connections, an approximate 80 PSI trip pressure, and numerous cross-references, giving 110500 replacement buyers useful fitment details.

Four-port plumbing with a 3/8-inch NPT supply, control, and delivery layout plus a 1/2-inch reservoir port gives this Lnkvorx 110500 a clearly specified replacement configuration. Its approximately 80 PSI trip pressure and spring-brake priority system support rapid air supply for brake release on single- or tandem-axle trailers.

The listed cross references include Sealco 110500 and several related numbers, giving buyers concrete identifiers to compare with an existing valve. Matching the 3/8-inch supply and control ports, 3/8-inch delivery port, and 1/2-inch reservoir port can simplify plumbing decisions when the vehicle uses that layout. The approximately 80 PSI trip pressure adds a useful operating specification, while the spring-brake priority system directs air for quick brake release. Zinc-alloy construction is also specified.

Skip it if you need the 110170 port arrangement with two reservoir ports; SevnYoko's 110170 lists that configuration.

For trailer owners replacing a compatible 110500, this valve suits systems using its specified port sizes and approximately 80 PSI trip pressure. Check the existing valve references and plumbing layout before choosing it, especially for a different reservoir configuration.

Listed on Amazon as: 110500 Spring Brake Control Valve, 3/8-1/2 in NPT, Compatible with Sealco

#2 · Detailed Port Spec

2. HPOPUAUTO 110500

• Size: Small
• Thread Size: 3/8"

Best for: 110500 Cross-Reference Replacement.

Why it ranks #2: Specifies a 3/8-inch supply, control, and four delivery ports plus a 1/2-inch reservoir port for 110500 replacements.

A factory-like fit and references to Sealco 110500 and 110500X make this HPOPUAUTO valve a targeted replacement option for buyers matching those numbers. The listing specifies three 3/8-inch ports and a 1/2-inch reservoir port, helping clarify its connection layout before a trailer brake valve swap.

The stated supply, control, and four delivery ports are 3/8 inch, while the reservoir port is 1/2 inch. That configuration gives buyers practical connection details to compare with existing lines before installation. Its listed cross references include 170.110500, 065438, and 51131 in addition to Sealco numbers, which can aid part identification. The description says it follows OE standards and has a factory-like fit; the dimensions field, however, is shown as 1 x 1 x 1 inches, not a usable fit guide.

Skip it if you need stated metal construction and physical dimensions; WQSING's 110500 listing provides both.

For buyers identifying a replacement by 110500-family numbers, this valve offers a stated port layout and factory-like-fit claim. Its listed dimensions are not useful for measuring clearance, so base selection on confirmed valve references and the specified connections.

Listed on Amazon as: 110500 Trailer Spring Brake Control Valve Compatible with Sealco 110500X 170.110500 065438 51131 Emergency Stop Priority Parking, Silver

#3 · Original Brand Pick

3. Sealco 110500

• Size: 3/8" or 1/2" BSPP
• Thread Size: 3/8" or 1/2" BSPP

Best for: Sealco 110500 Valve.

Why it ranks #3: The Sealco-branded 110500 is a direct option for buyers seeking that named valve, with listed 3/8-inch or 1/2-inch BSPP threads.

Sealco's own 110500 spring brake control valve is the direct brand choice for buyers matching that model number. The listing specifies metal construction and a 3/8-inch or 1/2-inch BSPP thread option, while its description notes that 110500 versions vary in how quickly they release parking brakes.

The Sealco name and 110500 model make identification straightforward for buyers replacing the same branded valve. Metal construction is stated, and the listed thread choices are 3/8-inch or 1/2-inch BSPP, giving a thread standard and size range to compare with existing connections. The description also distinguishes spring-brake-priority versions by how quickly parking brakes release. It does not identify which release behavior or a complete port layout applies to this particular listing, so those details remain important fit considerations.

Skip it if you need a specified 4 PSI crack and 55 PSI closing pressure; World American's RT-4 listing states both.

This is a sensible starting point for Sealco 110500 owners seeking the branded model and checking BSPP threads. The listing does not specify a particular release-priority behavior or complete port map, so those details should guide the final match.

Listed on Amazon as: Valve-Spring Brake Control 110500

#4 · Two-Valve Pack

4. Mytee Products 110500

• Size: OEM: 110500

Best for: Two-Valve 110500 Pack.

Why it ranks #4: This listing includes two 110500 spring brake priority replacement valves and states an 18-month warranty; confirm the plumbing fit separately.

Two spring brake control valves in one pack distinguish Mytee Products' 110500 replacement for fleets or maintenance work needing a pair. The listing identifies spring-brake priority and replacement for Sealco 110500, with additional references to K025778, Freightliner TAC51301, and 110500X for part-number checks.

The two-pack format gives maintenance buyers a pair of valves under one listing, which can suit planned replacement work where both units are needed. Spring-brake priority is explicitly stated, and the 110500 replacement reference helps identify its intended family. Additional cross references include K025778, Freightliner TAC51301, and 110500X. The supplied details do not give port sizes or a full connection diagram, so buyers should match the valve number and confirm the plumbing information from their existing system documentation.

Skip it if you need a single valve with a fully stated port layout; Lnkvorx's 110500 lists port sizes and connections.

For fleet or workshop buyers needing two 110500-family spring-brake-priority replacements, this pack offers a pair and several identifying references. Port dimensions are not supplied here, so verify the connection layout through the existing valve or service information.

Listed on Amazon as: Mytee Products 2 Pack Spring Brake Control Valve, Spring Brake Priority Replace 110500, Sealco, K025778, Freightliner TAC51301, 110500X

#5

5. WQSING 110500

• Size: 0.38 in

Best for: Metal 110500 Replacement.

Why it ranks #5: A metal 110500 replacement listing gives several cross-reference numbers and asks buyers to verify the OEM part number and fitment.

Metal construction and a 3.54 x 2.95 x 4.72-inch listed size make the WQSING 110500 a more physically specified option among these 110500 replacements. Its cross references include 110500X, 170.110500, 065438, and 51131, giving buyers several identifiers to compare against an existing valve.

The listed 110500-family numbers offer a practical starting point for identifying a replacement, while the stated dimensions give buyers some information for checking available space. The product is described as metal and includes one braking control valve. Its inlet and outlet connection sizes are both listed as 0.38 inches, but the listing does not provide a full port-by-port NPT layout. The accompanying guidance points buyers to OEM numbers on the manual or equipment sticker when matching the part.

Skip it if you need stated 1/2-inch reservoir and 3/8-inch delivery ports; Lnkvorx's 110500 lists those details.

For buyers matching a 110500-family number who also want listed dimensions and metal construction, WQSING provides useful identification details. The connection layout is not fully broken out by port, so check the OEM reference and existing plumbing before purchase.

Listed on Amazon as: 110500 Trailer Spring Brake Control Valve Compatible with Sealco

#6 · Broad 110170 Cross-Refs

6. SevnYoko 110170

• Size: 3/8” Npt, 1/2” Npt
• Thread Size: 1/2" NPT, 3/8" NPT

Best for: Multi-Port 110170 Replacement.

Why it ranks #6: Its 110170 cross-references include Sealco, Bendix, and Haldex models, and it lists 1/2-inch reservoir and 3/8-inch delivery ports.

Two 1/2-inch NPT reservoir ports distinguish SevnYoko's 110170 spring brake control valve and give compatible heavy-duty trailer plumbing a paired reservoir connection. Its listing also specifies four 3/8-inch delivery ports and 3/8-inch supply and control ports, providing a detailed configuration for buyers matching an existing valve.

The broad cross-reference list spans Sealco 110170-series numbers, Bendix 110170X and 287376, and Haldex KN26000-series references, helping identify systems that may use this replacement. Its two 1/2-inch reservoir ports and four 3/8-inch delivery ports make the connection layout explicit before installation. Separate 3/8-inch supply and control ports round out the specified plumbing, so buyers can compare their current lines and valve configuration against the listing rather than relying on the model name alone.

Skip it if you need a 110500 valve with a 1/2-inch reservoir port; Lnkvorx's 110500 lists that configuration.

This is a candidate for heavy-duty trailer owners whose existing valve matches the 110170 references and multiple-port layout. Confirm the reservoir and delivery plumbing against the listed NPT sizes; the detailed configuration is specific to this 110170-style replacement.

Listed on Amazon as: 110170 Spring Brake Control Valve, 3/8-1/2 in NPT, Compatible with Sealco

#7

7. Fudatong 110800

• Size: 3/8 Inch
• Thread Size: 3/8"

Best for: High-Flow Reservoir Applications.

Why it ranks #7: The 110800 listing specifies a 3/4-inch reservoir port alongside 3/8-inch delivery and control ports for buyers matching that configuration.

A 3/4-inch NPT reservoir port is the defining connection on Fudatong's 110800 spring brake control valve, paired with four 3/8-inch NPT delivery and control ports. Its spring-brake priority function directs air toward releasing parking brakes first, supporting the stated aim of reducing delay for commercial trucks and trailers.

The larger specified reservoir connection distinguishes this 110800 configuration from valves listing a 1/2-inch reservoir port, so it gives buyers a concrete plumbing point to check. Four 3/8-inch NPT delivery and control ports provide additional connection details for line planning. The spring-brake priority function is described as directing air to release parking brakes first, connecting the valve's operating role to vehicle movement. Cross references include 110800 and 110800SEA, useful identifiers when matching a replacement.

Skip it if you need a 1/2-inch reservoir connection; Lnkvorx's 110500 lists that port size.

For commercial truck, tractor, or semi-trailer owners replacing a compatible 110800, this valve suits plumbing that uses a 3/4-inch reservoir port. Check that larger connection and the four 3/8-inch ports against the existing setup before selecting it.

Listed on Amazon as: 110800 Spring Brake Control Valve Compatible with Truck Trailer

#8

8. World American RT-4

Best for: RT-4 Relay Valve Replacement.

Why it ranks #8: This RT-4 replacement listing names KN26000 and gives 4 PSI crack pressure and 55 PSI closing pressure, but it is a different design.

A stated 4 PSI crack pressure and 55 PSI closing pressure give this World American RT-4 valve concrete operating figures for buyers replacing a KN26000-style relay valve. Its RT-4 designation and included valve component identify the product type, while automatic operation supports its listed role in heavy-duty brake actuation and relay control.

The RT-4 designation and KN26000 replacement reference help narrow this valve to buyers matching that part family, rather than a general 110500-style selection. Its 4 PSI crack pressure and 55 PSI closing pressure provide useful operating specifications for comparing an existing setup. The listing describes it as an air brake valve for heavy-duty trucks and specifies automatic operation. Those details can guide part selection, but the supplied information does not provide a complete port-size layout for plumbing checks.

Skip it if you need a listed 1/2-inch reservoir port and four delivery ports; SevnYoko's 110170 specifies both.

This fits heavy-duty truck buyers matching an RT-4 or KN26000 replacement and checking the stated pressure figures against their system. Because port sizes are not supplied here, it is a less informative choice for buyers selecting by plumbing dimensions.

Listed on Amazon as: SPRING BRAKE CONTROL VALVE – RT4 RT-4 – REPLACES KN26000

#9

9. AUNVITO KN26000

Best for: KN26000 RT-4 Replacement.

Why it ranks #9: The listing identifies a KN26000 RT4 replacement, but supplies no port dimensions or pressure figures to help confirm system compatibility.

The KN26000 model and RT4 designation make this AUNVITO valve a specifically identified replacement for buyers matching that valve family. Its title names Haldex KN26000, and the listing describes manufacture to OE standards, giving buyers a replacement reference and stated production benchmark without supplying a detailed port configuration.

A clearly named KN26000 part number helps narrow the search for buyers replacing that model, while the RT4 designation further identifies the valve type. The description says it is manufactured following strict OE standards to work like the original component, which can inform expectations for a like-for-like replacement. The listing also says one valve is included. It does not provide port sizes or operating pressures, so buyers selecting by connection layout or pressure figures will need those specifications from another source.

Skip it if you need stated crack and closing pressures; World American's RT-4 lists 4 PSI and 55 PSI figures.

For buyers matching a KN26000 RT4 replacement by part number, AUNVITO offers a clearly named valve and an OE-standards claim. Its listing lacks port and pressure details, so it is not the most informative option when those determine fit.

Listed on Amazon as: KN26000 SPRING BRAKE CONTROL VALVE RT4 REPLACES Replacement For Haldex KN26000

#10

10. GPD SR-1 286364

• Size: 3/8 Inch
• Thread Size: 3/8 inch

Best for: Single-Port SR-1 Applications.

Why it ranks #10: This is a Bendix-style SR-1 valve with a single-port design and 3/8-inch outlet, making it a less clearly specified match for common multi-port replacements.

A single-port design sets this Bendix-style SR-1 valve apart for buyers seeking a straightforward air-control configuration. Global Parts Distributors lists a 3/8-inch threaded inlet and 3/8-inch outlet, plus metal construction, giving a compact set of connection and material details for evaluating a replacement.

The single-port configuration is described as suitable for straightforward installation and maintenance, making it relevant to buyers whose existing setup uses that layout. A threaded inlet and 3/8-inch outlet specify the connections provided, while the metal construction is listed as a durability feature. The valve is identified as Bendix style SR-1, model 286364. These details help distinguish it from multi-port spring brake valves, but the listing simply calls it an air valve and does not supply further operating pressures.

Skip it if you need a four-delivery-port 110500 layout; HPOPUAUTO's 110500 specifies four 3/8-inch delivery ports.

This SR-1-style valve suits buyers whose air-control setup calls for the listed single-port configuration and 3/8-inch connections. It is not a substitute for a multi-port spring brake valve, so match the existing valve type and plumbing first.

Listed on Amazon as: One Bendix Style SR-1 Spring Brake Control Valve 286364