Aug 12, 2021

Hard Wall Exhaust Hosea hard-wall exhaust hose, correctly double clamped, per ABYC standards

There are so many applications for hoses aboard, and each requires a specific type. There hoses for: fuel, exhaust, scuppers, engine water intake, potable water (hot and cold), waste, water heaters, bilge water, gear lube, and blowers.

The American Boat and Yacht Council (ABYC) sets standards for boating safety – if you’ve had a boat survey done recently, you may note that many of the recommended items are according to ABYC standards. ABYC has set standards on many of these hose types, in an effort to keep boats seaworthy, and boaters safe.

Hoses Part 1 appeared on July 22

Engine Raw-water hose:

Engine manufacturers usual prescribe heavy-duty hoses for engine installation. These hoses run from the boat’s through-hull to the water pump, and from the water pump to the heat exchanger, up to the engine’s exhaust. That said, its often easier (and cheaper) to install a light duty rubber to connect the raw-water seacock to the raw-water pump, plumb in a siphon break, and make the connections to a hot-water heater.

Although heater hose is generally heat resistant and is adaptable to high pressure, it is think and soft. This can cause collapse under the vacuum created by the engine’s raw water pump, ultimately starving the engine of cooling water. Abrasion resistance can also be an issue, especially on hoses the run against the engine bed and risers: the engine vibration can cause the hose to chafe and wear through.

Good-quality marine water hose, will be thicker than heater hose, and reinforced with different synthetic materials in multiple layers.

Potable water hose:

ABYC and standards state that a potable water system should be plumbed with hose or tubing manufactured from Food and Drug Administration (FDA)-approved materials, with the hoses or tubing so labeled. The FDA, in turn, requires PVC hoses to be manufactured from virgin, rather than recycled, PVC and textile reinforcement. Compliant hoses are stamped "FDA approved."

Scupper and bilge hoses:

ABYC standards make a distinction in hoses that are ‘below the water line’ – these are hoses that, if broken or damaged, will cause the boat to fill with water, ultimately sinking. Below the waterline hoses include scupper, drains, bilge hoses, and any hoses connected to seacocks. The same hose that's used for engine raw water hose is often an appropriate choice for cockpit drains, sink drains, and toilet suction lines: These hoses are chosen based on their minimal strength, tolerance to chemicals, abrasion resistance, and withstanding the pressure of suction (in bilge and toilet applications), without collapsing. A heavy duty, fabric reinforced rubber should be used.

ABYC H27, Recommended Practices and Standards Covering Seacocks, Through-Hull Fittings, and Drain Plugs, calls for the installation of a seacock on "all piping, tubing, or hose lines penetrating the hull below the maximum heeled waterline.. under all normal conditions of trim". Another note: it is recommended that double hose clamps are used on all below-the-waterline hose connections. However, if there isn’t sufficient room to properly space two hose clamps, one may end up not secured to the fitting, potentially damaging the hose.

Waste:

Sanitation Hose(Right) proper sanitation hose, but left unsupported.

Toilet-discharge hose must be of a special impermeable type, generally labeled "Sanitation Hose." It’s available in PVC and Rubber varieties, and the choice depends on a few factors:

PVC sanitation hose must be specially compounded from a high-density material with a greater than-normal wall thickness, in order to increase resistance to moisture absorption. As a result, it’s quite stiff, and may therefore be difficult to fit tightly to any hose barbs. If the barb is undersized, the clamping pressure needed to seal the hose to the barb will cut into the hose, and cause it to develop microscopic cracks (creating hard-to-trace leaks) at the edge of the clamp. If, on the other hand, the barb is too big, and the hose has to be stretched over it, the hose will work-harden and once again develop microscopic cracks where it has been stretched.

Rubber Sanitation hose is more tolerant than PVC hose of poor hose-barb fits. It also has greater flexibility, and, thanks to its heavy-wall construction, resists permeation much longer.
When installing sanitation hoses-either PVC or rubber, avoid creating low spots that will retain waste.

Fuel Hose Linerthe liner of a fuel hose that has broken down. This liner can end up clogging pumps, carburetors or injectors.

Maintenance

Even with high quality, properly installed hoses, there is always the potential for an unforeseeable failure. Many boat owners leave crucial seacocks open from one season to another, and never look at their hoses and hose clamps. Regular maintenance and inspection should be done on hoses, clamps, and seacocks. Attention should also be given to the types of fluids that are flowing through the hoses - including the types of fuel (ethanol content), the antifreeze that’s used, and the cleaning, sanitation and deodorizing chemicals that may come into contact with hoses and fittings.

Andrew McDonaldAndrew McDonald is the owner of Lakeside Marine Services – a boat repair/maintenance firm based in Toronto. Andrew has worked in the marine industry for 12 years and is a graduate of the Georgian College ‘Mechanical Techniques - Marine Engine Mechanic’ program.

Questions or comments for Andrew? Email him directly via: This email address is being protected from spambots. You need JavaScript enabled to view it.

Related Articles

Wednesday, 09 August 2017 02:52

The moment we all dread. It’s a warm sunny day and you’re out for a cruise. Suddenly the boat shudders beneath you, pings, dings and clangs are heard and you realize that you’ve hit something...

Wednesday, 11 October 2017 05:00

If you walk the aisles at a boat show, visit a marine store, or stop in at a repair shop, you’ll likely be inundated with digital displays, vivid touch-screens, NMEA compatible devices, and...

Monday, 19 August 2013 13:43

It’s been a long time since I went for an unexpected swim, but it’s happened to me before and it will probably happen again. While losing your balance and hitting the water is bad (really bad if you...

Tuesday, 12 September 2017 06:10

The moment we all dread. It’s a warm sunny day and you’re out for a cruise. Suddenly the boat shudders beneath you, pings, dings and clangs are heard and you realize that you’ve hit something...

Wednesday, 10 May 2017 00:43

Question: Can I buy generic automotive parts or products for my boat, or should they specify ‘marine’?

Tuesday, 11 July 2017 07:16

For most of us – this is the time to make the most of the boating season – launch and set up are done. Systems have been recommissioned. Let the fun begin!

Boat Reviews

Video Gallery

 

 

Beneteau Oceanis Yacht 54By Zuzana Prochazka

Beneteau saw an opportunity to add a little thrill to any cruising adventure, so they took the hull of the First 53 racer (introduced just last year), and with a few fashionable changes, created the Oceanis Yacht 54, the new entry-level of Beneteau’s swanky Oceanis Yacht line. The result is a performance cruiser that sails like a witch and looks like a grande dame.

Design

Roberto Biscontini is the naval architect and Lorenzo Argento created the details of the exterior and interior design. 

Read More

Destinations

  • Prev
Over the course of four days in September 1864, representatives from Prince Edward Island, Nova ...
The new owners of L’Orignal Marina offer boaters a new destination. Located in a charming ...
On Friday, April 2 at 7 pm ET on TVO and streaming anytime after that on tvo.org and the TVO ...
Salt Spring Island, the largest among the Gulf Islands, has a certain mystique—much of it having to ...
Located in Lake Huron, the internationally significant Manitoulin Island is the largest freshwater ...
In Part I, Sheryl Shard ended the story at June and the start of Hurricane Season when they were ...
You likely aren’t quite ready to travel yet, but we have our fingers crossed that we can all fly ...

Riverest MarinaThe new owners of L’Orignal Marina offer boaters a new destination. Located in a charming francophone village in Eastern Ontario, this joined marina and restaurant venue is the ambitious initiative of long-time entrepreneur André Chabot and biologist Alexandra Quester, both residents of L’Orignal.

The purchase of the L’Orignal Marina was made official in November 2020. The new year was barely underway when all 50 available slips were already reserved. No wonder the addition of member and visitor slips is already planned for the 2022 season – the 2021 count is up to 62 power and sail already. At the moment, the Riverest Marina offers boaters a stop where they can launch their boat...

Read More

Lifestyle

  • Prev
Last issue we featured a story about the engagement proposal aboard Via-Mara, a 1969 Trojan 42 Aft ...
With thanks to Sail Canada, here’s a collection of photos that are Olympic quality. Clearly our ...
Wow. That was a lot of fun reading the collection of boat names that came in from all over the ...
No individual had a greater impact on the modern sport of sailing than Bruce Kirby. Known and ...
Just off The Ocean Race European Tour, Daniel is setting his sights on competing in The Ocean Race ...
After being our fearless leader and publisher since CYOB kicked off, Greg Nicoll, handed over the ...
Swim Drink Fish is spearheading the Vancouver Plastic Cleanup by installing, maintaining, and ...
With but four weeks to go, Sarah is in Japan, staying safe while acclimatizing to the heat at ...
MJM is a different kind of boat builder, second generation family owned and operated, we design and ...
Stuart Hendrie, a pro photographer sent along this photo of the pirate ship in Jordan Ontario. Many ...

Marine Products

  • Prev
Watermakers take ocean water and create perfect drinking water using reverse osmosis. A Schenker ...
If you’re headed out for a weekend afloat or on a week-long cruise you often must park your vehicle ...
Ten years ago, St. Margaret’s Bay (Halifax), Nova Scotia-based SailTimer Inc. made the first ...
Between the odor and working in confined spaces, replacing an onboard sanitation line is never a ...
For many boat owners who have gear to tote and the occasional stretch of bumpy road to negotiate, a ...
The 2022 Sea-Doo Switch is a re-imagined pontoon that makes hitting the water more accessible than ...
On the water audiophile-quality sound is attainable with the new JBL-R3500 source unit. The latest ...
An environmentally friendly product for refinishing your teak, hemp wood finishing oil is an ...
August means cruising, entertaining and enjoying summer at its finest. And that means food and ...
A Bluetooth-enabled phone or tablet is ideal for streaming music, but it's often stowed safely away ...

News

  • Prev
Royal Canadian Yacht Club’s Defiant completed a six-race sweep of the Cup for Canada over Zing, the ...
On September 6, Groupe Beneteau laid out its course to develop new boating experiences, new ...
Last Friday, the first ever Canada’s Celebration of Sailing honoured the season for Sailing in ...
Boating Ontario is very proud to have Transport Canada’s Office of Boating Safety jump on ...
Montreal-based Vision Marine Technologies, Inc. is headed to the Lake of the Ozarks Shootout to ...
Summer is in full swing with Canadians enjoying time outside and on the water. So, while enjoying ...
On July 23 last year, CYOB published a piece on a beautifully restored 1967 Trojan 42 Motor ...
HanseYachts AG presents RYCK, its third motorboat brand carrying the "Made in Germany" label. The ...
“We are all proud of our athletes and coaches who have dedicated themselves to push Canadian ...
Collingwood, ON hq’d Limestone Boat Company – owner and builder of Aquasport Boats, Limestone Boats ...

Mia and Caleb's EngagementOn July 23 last year, CYOB published a piece on a beautifully restored 1967 Trojan 42 Motor Yacht in Oromocto NB. (That piece was also expanded in CY magazine later in the year.)

One of our Canadian Yachting contributors, Denise Miller, had shared the article on my social media and a young man reached out and asked if she could connect him with the owners of the boat, Dave and Barb. Denise leapt into action and Dave and Barb were thrilled. They concocted a plan that the young lady, Mia, thought she was coming to model for a sales brochure for Dave to do charter tours.

Read More