
18-8045 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $14.99 | Condition is New other (see details), Sierra 18-8045 Brass Reducing Nipple 1/8" x 1/4" Hex Center, FREE SHIPPING | ![]() |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $3.46 | Condition is New, Sierra Marine Reucing Fuel Fitting 1/8" x 1/4" NPT HEX, P# 18-8045, shipping cost = $2.65 | 98.1% |
![]() | $3.50 | Condition is New, Sierra Reducing Nipple, 1/8" x 1/4" NPT Hex, P#18-8045, MADE IN USA! New!!, shipping cost = $4.50 | 98.1% |
![]() | $5.99 | Condition is New, NEW! Sierra Reducing Nipple 18-8045, shipping cost = $2.50 | 99.2% |
![]() | $5.99 | Condition is New, NEW! Sierra Reducing Nipple 18-8045, shipping cost = $5.62 | 66.7% |
![]() | $7.95 | Condition is New, Sierra Marine Reducing Nipple 18-8045 NEW, shipping cost = $4.95 | ![]() |
![]() | $8.91 | Top Pick! Condition is New, Sierra 18-8045 Brass Reducing Nipple 1/8" x 1/4" Hex Center, shipping cost = $3.15 | ![]() |
![]() | $8.99 | Condition is New, Sierra Brass Reducing Nipple, 1/8" x 1/4" NPT Hex, 18-8045, Lot of 3, NOS, shipping cost = $5.89 | ![]() |
![]() | $13.76 | Condition is New, Sierra Marine 18-8045 Reducing Nipple 1/8" NPT 1/4" NPT Hex, FREE SHIPPING | 100.0% |
![]() | $6.82 | Top Pick! Condition is New, Sierra Reducing Nipple Fitting #18-8045, shipping cost = $8.60 | 99.5% |
![]() | $10.00 | Condition is New, NEW! Sierra Reducing Nipple 18-8045, shipping cost = $4.00 | 100.0% |
![]() | $9.31 | Condition is New, All makes/models outboard Sierra reducing nipple 1/4" to 1/8" NPT 18-8045. New, shipping cost = $13.17 | 100.0% |
![]() | $29.95 | Top Pick! Condition is New, lot of 4 Sierra 18-8045 Marine Reducing Nipple Fitting, shipping cost = $8.60 | 99.9% |

Introducing the Sierra Marine Reducing Nipple, model number 18-8045, a versatile and essential component for various marine applications. This nipple is designed to reduce the pipe size from 1/8 NPT (National Pipe Thread) to 1/4 NPT, making it an indispensable tool for plumbing and fluid transfer systems on boats and other watercraft.
Crafted from premium 18-8 brass material, this reducing nipple boasts superior corrosion resistance, ensuring a long-lasting and reliable performance even in the harshest marine environments. The 1/8 NPT female thread and the 1/4 NPT male thread conform to standard industry specifications, allowing seamless integration with a wide range of marine systems and components.
The hexagonal shape of the 1/4 NPT male thread provides easy installation and removal with the use of a wrench or a hexagonal socket. Its compact design ensures minimal space requirements, making it a popular choice for confined areas and tight installations.
Sierra's marine reducing nipple, model 18-8045, is meticulously manufactured to meet stringent quality standards. The nipple undergoes rigorous testing to ensure a tight seal and leak-free performance. Its polished finish not only enhances its aesthetic appeal but also contributes to the overall durability and resistance against corrosion.
In summary, the Sierra Marine Reducing Nipple 18-8045 is an indispensable component for marine plumbing and fluid transfer systems. Its high-quality brass construction, standard thread sizes, and compact design make it a reliable, versatile, and long-lasting solution for reducing pipe sizes in marine applications.
Pros and Cons of Buying a Sierra 18-8045 Marine Reducing Nipple (1/8 NPT 1/4 Hex)
The Sierra 18-8045 Marine Reducing Nipple (1/8 NPT 1/4 Hex) is a plumbing component commonly used in marine applications. This nipple reduces the pipe size from 1/8 NPT (National Pipe Thread) to 1/4 NPT. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this nipple.
Pros:1. Marine-grade materials: The Sierra 18-8045 Marine Reducing Nipple is specifically designed for marine applications. It is made of high-quality materials that can withstand the harsh conditions of saltwater and sunlight.
2. Leak-free connection: This nipple features a hexagonal shape, which allows for secure tightening with a wrench or a socket. The marine-grade material and precise threading ensure a leak-free connection.
3. Wide applicability: The 1/8 to 1/4 reduction is a common size used in various marine plumbing applications, making this nipple a versatile addition to any marine toolkit.
4. Durability: The marine-grade material used in the construction of this nipple ensures its durability, even when exposed to the harsh marine environment.
Cons:1. Cost: The Sierra 18-8045 Marine Reducing Nipple may be more expensive than standard nipples due to its marine-grade materials and specific application.
2. Limited availability: Since this nipple is designed specifically for marine applications, it may be harder to find in local hardware stores and may require ordering online.
3. Overkill for some applications: For non-marine applications, a standard reducing nipple may be sufficient and more cost-effective.
Conclusion:The Sierra 18-8045 Marine Reducing Nipple (1/8 NPT 1/4 Hex) offers several advantages, including its marine-grade materials, leak-free connection, versatility, and durability. However, its potential disadvantages include its cost, limited availability, and potential overkill for non-marine applications.
Recommendation:If you are working on a marine plumbing project, the Sierra 18-8045 Marine Reducing Nipple is an excellent investment due to its marine-grade materials and superior sealing capabilities. However, if you are working on a non-marine project, a standard reducing nipple may be a more cost-effective option. Always ensure you have the correct size and threading for your specific application.
Details:
Sierra Marine 18-8045 reducing nipple 1/8 npt 1/4 hex, brand new.
specifications inboardfuel:
- for models: Marine
- brand: Sierra
- mpn: 18-8045
- country of origin: United States
- upc: 808282368548
seller inboardfuel:
- # reviews: 1539
- city: south windsor, connecticut
- rating: 100.0%
shipping inboardfuel:
- type: calculated
- service: usps ground advantage
- carrier: usps
- transit: 5-12 days
- class: standard
offer inboardfuel:
- started: november 19, 2025
- in stock #: 5
- options: ship-to-home
- prices: $3.46–$29.95
- item condition:
- New other (see details)
- New
- availability: in stock
- sold #: 12
payments inboardfuel:
- other
- credit card: mastercard
- wallet: paypal
general inboardfuel:
- category: Boat Parts > Inboard Engines Components > Intake Fuel Systems
returns inboardfuel:
- time: 60 days
- policy: returns accepted
- paid by: seller
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