This listing covers the HPS 9/16″ (14mm) ID, 1-5/8″ Long Black Silicone Reinforced Coolant Cap w/Clamp For Bypass Heater Vacuum Valve Water Port, one of the parts our fitment desk checks most often.
Inner diameter must match the fitting exactly, since eyeballing sizes is how leaks begin. Replace both the upper and lower runs while the system is open.
Our team knows the clamp for bypass heater vacuum valve water well, so ask if anything about the specification is unclear.
Stock of the clamp for bypass heater vacuum valve water is live on this page rather than estimated.
Shops order the clamp for bypass heater vacuum valve water 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 valve water against it.
The clamp for bypass heater vacuum valve water ships protected, because a damaged part helps nobody.
Drivers choose the clamp for bypass heater vacuum valve water here for honest specification detail and quick dispatch.
Buyers comparing the clamp for bypass heater vacuum valve water will find the specification detail on this page rather than in a catalog footnote.
At a glance
- Material: Silicone
- Finish: Black
- 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 black 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-BLK
Temperature Range:- 65 deg. F to + 350 deg. F (177 deg. C)
Reinforced Layer: 3-ply Polyester
Inside Diameter: 9/16″ (14mm)
Color: Black
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: Black
- 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-BLK, EMSC-40-60, RSCC150BLK, EMSC4060, 648044901121, 648044825557
When two options look similar, our parts team will tell you which one your vehicle actually takes.
Explore more: Hoses & Fittings · HPS 3.12″ (80mm) ID, 4″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · HPS 2.25″ (57mm) ID, 6″ Leg Long Black 4-Ply Silicone 1/2″ Offset Coupler Hose · full catalog
Orders placed before early afternoon usually leave our USA warehouse the same business day, with tracking emailed at label creation.
When you want a second opinion that is not a parts store, read the NHTSA vehicle safety hub.
Quick answers
How do I confirm this fits?
Share your vehicle details with our team and we cross reference this listing before dispatch. Anything doubtful gets a message from us rather than a shipment.
Do you ship the same day?
Most orders dispatch within one business day. You receive tracking by email the moment the parcel is handed to the carrier.
What happens if it arrives damaged?
Report any transit damage with a photo and we will send a replacement or refund you. We handle the carrier claim ourselves.
How do you protect it in transit?
Lines and fittings are checked for pressure rating, inner diameter and ply count before shipping.

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