Cost To Replace Bilge Pump – The world’s best bilge pump will not keep your boat dry if it is not installed and maintained correctly. While installing a bilge pump is fairly easy, and definitely belongs in the category of DIY projects, there are a number of factors (capacity, line size, hose diameter, fuse size) to consider before get started, and some good rules of thumb to follow.
The first step is selecting the right dewatering pumps for the job. We recommend the installation of two electric centrifugal pumps (preferably with an automatic water level sensor): a smaller pump mounted in the belly of the bilge, which handles any bilge water (rain, dripping from the stuffing box, etc.) with a minimum power, and another pump a few inches higher for bigger jobs. There are many reasons for this; the main thing is that in the event of a pump failure, a spare is always installed.
Cost To Replace Bilge Pump
Capacity: For most medium-sized boats (30 to 35 feet long), we recommend a 1,000 to 1,500 gallons per hour (GPH) pump for the primary pump and a pump with a capacity of around 2,000 GPH. for backup The American Bureau of Shipping recommends a 24 GPM (about 1440 GPH) pump and a 12 GPM (720 GPH) pump for boats under 65 feet.
Attwood Tsunami Bilge Pump
When comparing performance data from various pumps, make sure the rating criteria are the same. New American Boat and Yacht Council (ABYC) standards require applicable manufacturers to rate pump capabilities to reflect real-world use. ABYC requires pumps to have a head height of 1m (also known as vertical lift) and a hose length of 3m, and a head height of 2m and a hose length of 6m. The height is the vertical height of the hose outlet above the pump outlet. Head pressure (also known as static pressure) is the resistance the pump must overcome when pumping water up and out of the boat. This includes the resistance caused by the vertical distance the pump needs to move the water up (vertical lift) and the resistance generated by the discharge piping (hose break, finned hose, fittings and elbows). Some ratings will also be given at 13.6V instead of the more realistic 12.2V (for a 12 volt system). The latter more accurately reflects the capacity in real conditions.
Main features: The automatic pump relies on a water level sensor, such as a float switch, to activate the pump. It can be a separate unit or a unit built into the pump. This sensor must be resistant to contamination and easy to inspect for proper operation. Generic float switches must be housed or they are more prone to fouling with debris in the bilge. An easily accessible strainer (or faucet) is also important, as are long lines to help keep connections out of the wet bilge area.
Location: According to ABYC, the pump inlet must be located so that the bilge water can be removed when the vessel is in a static position and at maximum heel (ABYC H-22). The place of installation must also allow the maintenance and cleaning of the pumps, especially the filters.
The discharge opening (through the hull) must be above the maximum tilt angle to prevent water from entering the boat from outside. Per ABYC H22, if you cannot locate the discharge in this manner, then a vent loop (mounted above the sloping waterline) and a properly fitted seacock must be incorporated into the configuration. (Check valves should not be used in this scenario.)
Johnson Pump Cartridge Bilge Pump, 1000 Gph
When installing two electric pumps, the smaller pump should have a built-in float switch, be mounted at the lowest point in the bilge and be connected directly to the battery via a fuse. The larger pump is mounted a few inches higher, but not directly on top of the smaller pump. As shown in the figure, you can mount the larger pump to a piece of plywood that is glued to the sides of the bilge. It must be connected to a dedicated circuit breaker, which can be used as a switch, or to a dedicated and well-marked rocker switch.
Plumbing: When installing an electric bilge pump, make sure the equipment is designed to reduce discharge pressure as much as possible to maximize discharge capacity: use a smooth hose of the size recommended by the manufacturer; hose passages should be as short as possible; and try to avoid bends, curves, and elbow joints while running. In terms of resistance increase, bending a 1-inch diameter discharge hose 90 degrees is equivalent to adding 3 feet of hose to the line, which is equivalent to reducing a 3000 GPH pump sampling to 2000 GPH pump when the battery is fully charged. According to pump manufacturer ITT/Rule, small electric submersible pumps are rarely useful with vertical discharge heads greater than 4 feet, and medium/large submersible pumps are equally ineffective with heads greater than 7 feet.
The pressure line should rise continuously towards the passing hull or loop. If there are low spots in the run, water collects there when the pump turns off. This can create an air pocket when the pump kicks in again and is likely to stop. Hose connections must be made with non-corrosive clamps as recommended by ABYC and must be airtight.
Wiring – Use Properly Sized Wires and Fuses – Proper wire size reduces voltage drop and properly fused wires reduce the risk of a locked rotor (motor tries to turn but cannot), causing overcurrent and a potential fire hazard.
Boat Bilge Pump
Check the American Wire Gauge 3% Voltage Drop Chart (www.marinco.com/page/three-percent-voltage) to make sure you’re using a long enough wire. Remember that the run length given in the wire gauge tables is the sum of the positive and negative legs of the circuit; a pump within 10 feet of the battery will be called a 20-foot line runner.
For fuse size, simply follow the pump manufacturer’s recommendations and you’re good to go. The fuse must be installed within 7 inches of the power source in accordance with the ABYC standard.
If the pump lines are too short, carefully extend them. Use oversized tinned marine cables and adhesive heat shrink connectors. ABYC standards recommend the use of a sealed, waterproof electrical cable run at the pump connection so that all electrical connections can be made above the maximum bilge water level.
Accessories – The bilge pump system comes with some additional accessories, including a visual/audible bilge alarm, a bilge switch, and a cycle counter. ABYC standards require alarms on ships with closed berths. Make sure the alarm is loud enough to be heard over engine noise while underway and ideally by passers-by or port staff when docked.
Rule Non Automatic 800 Gph Bilge Pump
Automatic pumps should always be equipped with an easily accessible and clearly marked manual switch so that, even when the owner is not around, anyone (staff, dock neighbors or passers-by) can find and activate the switch if necessary. The switches should also visually indicate that the pump is receiving power. Among the mercury-free bilge switches featured in the January 2006 issue, our top pick is the electronic Water Witch 230.
If the larger capacity pump has a float switch, we strongly recommend connecting it to a bilge alarm (and alarm switch). Then hopefully the horn will catch someone’s attention before the constant rotation of the pump drains the batteries. We reviewed the Aqua Vigil alert in the May 15, 2001 issue and found it simple yet quirky. We plan to review the bilge alarms and cycle counters, including combination units such as the Aqua Alarm pump monitor, alarm and counter.
Periodic and frequent inspections of the bilge pumps are mandatory and must be included in the general preventive maintenance program of the ship. This helps you know when to replace worn or damaged parts (faulty float switches, worn hoses) before they fail. It’s always a good idea to make sure the pump has power and is working properly before you start, bearing in mind that the test is to verify the actual pumping of water, rather than (in the case of electric pumps) simply changing the pump. . ignition and monitors engine operation.
Keeping your bilge water clean can be a challenge, but nothing compared to the headache of a locked rotor or impotent bilge pump in an emergency.
Boating 24v Johnson Pumps 32903 24v 1000 Gph Cartridge Bilge Pump Plumbing Fittings Originsofwhiskey.com
For more details on each pump, check out our recent tests of heavy-duty bilge pumps over 1500 GPH and smaller pumps rated at 1500 GPH.
For a more complete guide to upgrading the basic systems on your boats, check out our 5-volume e-book series on marine electrical systems at https:///products.
Despite the abundance of named storm warnings we receive, there never seems to be enough time to make the necessary preparations. And when the weather starts to take a turn for the worse, setting up your storm gear becomes difficult and exhausting, even if you can make it to the hole in the hurricane. If you’re sailing in a hurricane-prone area this year, take some time in June (or earlier) to test your chosen location. Disassemble the ship and put it into operation
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