The HPS 9/16″ (14mm) ID, 1-5/8″ Long Red Silicone Reinforced Coolant Cap w/Clamp For Bypass Heater Vacuum Valve Water Port is in stock at PartSmith Co. and ready for dispatch from our USA warehouse.

Reinforcement ply count determines burst strength, which matters most on boosted applications. Measure inner diameter at the fitting rather than estimating by eye.
Ordering the clamp for bypass heater vacuum takes a minute and the confirmation reaches you straight away.
Our team knows the clamp for bypass heater vacuum well, so ask if anything about the specification is unclear.
Stock of the clamp for bypass heater vacuum is live on this page rather than estimated.
Shops order the clamp for bypass heater vacuum from us in volume because the data on the page is accurate.
If your build is unusual, tell us and we will confirm the clamp for bypass heater vacuum against it.
The clamp for bypass heater vacuum ships protected, because a damaged part helps nobody.
Drivers choose the clamp for bypass heater vacuum here for honest specification detail and quick dispatch.
What you are buying
- Material: Silicone
- Finish: Red
- Category: Universal Hose
- Price: $27.95 with free shipping over $99
- Availability: in stock, dispatched from the USA
Manufacturer specifications
The HPS Performance 9/16″ (14mm) high temperature reinforced Red silicone cap is designed specifically to be installed on your cooling system. Vacuum caps have no reinforcement and are intended for vacuum and very little pressure. The HPS reinforced silicone caps are manufactured just like our reinforced silicone radiator hoses. While traditional rubber coolant cap might crack and cause coolant leak, HPS Performance high temperature 3-ply polyester reinforced silicone caps will withstand the high temperatures and pressures of your cooling system for years to come.
HPS Reinforced Silicone Caps are compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
Technical Specification
Product Type: Reinforced Silicone Coolant Cap
HPS Part Number: RSCC-055-RED
Temperature Range:- 65 deg. F to + 350 deg. F (177 deg. C)
Reinforced Layer: 3-ply Polyester
Inside Diameter: 9/16″ (14mm)
Color: Red
Wall Thickness: 4mm
Inside Length: 1-3/16″
Overall Length: 1-5/8″
UV and ozone resistant
Remark: HPS reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products.
- Material: 3-Ply Reinforced Polyester Silicone
- Color: Red
- Made of High Temperature 3-ply Polyester Reinforced Silicone. Maximum Temperature Rating: 350 deg. F (177 deg. C).
- Ideal for heavy duty pressure connections and provides excellent resistance for high temperature applications
- Compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
- Inside Diameter: 9/16″ (14mm). Overall Length: 1-5/8″
- HPS reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products.
Come with a HPS Brand Stainless Steel clamp (match Size) to complete your project
Application:
HPS Reinforced Silicone Caps are Universal Fit that compatible for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
Remark:
Installation: Compatible with Water/Coolant ONLY, Not for Fuel/Oil
Product Content:
- 1 x Coolant Cap
1 x Clamp
The product does not come with manual/instruction, Professional Install Recommended
Cross Reference Number:
- RSCC-150-BLUE, EMSC-40-60, RSCC150BLUE, EMSC4060, 648044901138, 648044825557
Send the old part number or a photo and we will match it against this listing before you commit.
Customers also open: Hoses & Fittings · HPS 4″ (102mm) ID, 4″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · HPS 3.12″ (80mm) ID, 6″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · full catalog
You get honest delivery estimates rather than optimistic ones, quoted live for your address.
Background reading that is not trying to sell you anything: the NHTSA vehicle safety hub.
Common questions
How do I know this is the right part?
We verify every doubtful order by hand. Give us the year, make, model and engine option and we will confirm compatibility in one reply.
Do you ship the same day?
Dispatch is normally the same or next business day, and heavy items travel on freight with a booked delivery window.
What is the return policy?
Parts are covered against defects for the period stated on this page, and non defect returns follow our standard returns window.
Is this checked before shipping?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.
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