Buck Algonquin 2 in. Bronze Pipe-to-Hose Adapter – HN-200
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Buck Algonquin 2 in. Bronze Pipe-to-Hose Adapter – HN-200
| Part Number | HN-200 |
| Brand | Buck Algonquin |
| SKU | BUC-HN-200 |
| Official Part Type | Bronze Pipe-to-Hose Adapter — Straight |
| Material | Cast bronze |
| Pipe Connection | 2" male pipe thread |
| Hose Connection | 2" ID hose |
| Configuration | Straight (for 90° elbow version, see HN-200-E) |
| System | Marine plumbing — raw water, bilge, sanitation, engine room |
What This Fitting Does
Buck Algonquin HN-200 is a cast bronze straight adapter that transitions from a 2" male pipe thread port or fitting to 2" ID flexible marine hose. It provides a durable, corrosion-resistant connection point wherever a rigid threaded bronze plumbing component needs to connect to flexible hose in a marine installation.
Compatible Applications
- Raw-water intake and discharge plumbing
- Seawater cooling system hose connections
- Bilge pump discharge plumbing
- Marine sanitation system hose runs
- Engine-room water circuit connections
- Above- and below-waterline hose systems where bronze fittings are specified
Fitment Notice
Confirm both the 2" threaded port size and 2" hose inside diameter before ordering. Buck Algonquin produces the HN series across multiple sizes — order the size that matches your specific port and hose:
- HN-50 — 1/2" pipe x 1/2" hose
- HN-75 — 3/4" pipe x 3/4" hose
- HN-100 — 1" pipe x 1" hose
- HN-125 — 1-1/4" pipe x 1-1/4" hose
- HN-150 — 1-1/2" pipe x 1-1/2" hose
- HN-200 — 2" pipe x 2" hose (this part)
- HN-250 — 2-1/2" pipe x 2-1/2" hose
- HN-300 — 3" pipe x 3" hose
Important: The straight HN-200 is not the same as HN-200-E, which is the 90° elbow version of the same 2" pipe-to-hose adapter. Both use the same pipe and hose sizes but serve different installation layouts. Confirm your routing before ordering.
When to Replace
- Cracking, impact damage, or dezincification is visible
- Pipe threads are damaged or stripped
- Hose-barb surfaces are distorted or corroded
- Persistent leakage at the threaded or hose connection
- Damage discovered during routine plumbing service
Installation Notes
Apply a marine-compatible thread sealant appropriate for bronze fittings. Secure the hose with correctly sized marine hose clamps — two clamps per hose end are recommended for below-waterline connections. Do not overtighten the threaded connection, particularly when threading into another cast bronze component, as over-torquing can crack fittings.
Inspect the mating hose for hardening, splitting, swelling, or clamp corrosion whenever this fitting is removed for service. Replace hose if any deterioration is present.
Service Interval
Inspect at each haul-out or plumbing service. Replace if corrosion, thread damage, or leakage is present. Bronze fittings in raw-water systems should be checked annually for dezincification, particularly in high-salinity environments.
Technical FAQ
What is the difference between HN-200 and HN-200-E?
HN-200 is a straight adapter. HN-200-E is a 90° elbow adapter. Both are 2" pipe x 2" hose. The choice depends entirely on the hose routing in your installation.
What thread sealant should I use?
Use a marine-rated pipe thread sealant compatible with bronze fittings and the fluid being carried (raw water, sanitation, bilge). PTFE tape is acceptable for many plumbing applications; consult the installation requirements for your specific system.
Can I use this fitting below the waterline?
Buck Algonquin bronze fittings are commonly used in below-waterline marine plumbing. Follow ABYC standards for hose clamping and seacock requirements for any through-hull connections.
Is this the same thread as NPT?
Marine pipe threads are typically NPT (National Pipe Taper). Confirm your port thread standard before installation. Do not mix NPT and BSP fittings.
Parts Desk Insights
The HN-200 is a straightforward fitting, but the most common ordering issue is confusing it with the HN-200-E — both are 2" bronze pipe-to-hose adapters, but the E is a 90° elbow. Take a look at the hose routing before ordering: if the hose needs to turn at the fitting, the HN-200-E is the right call. The other thing worth checking at replacement time is the condition of the mating hose — if the fitting needs replacing due to corrosion, the hose end that sat over it often has deterioration hiding under the clamp band that is not visible until the clamp is removed.
Shipping information
In-stock and OEM parts: ship same or next business day.
Available items are ready for pickup or shipping between one and three days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.