Overview
The Iwaki RLT Series pumps are outstanding choices for today's serious hobbyist. These pumps are fan-cooled and magnetically-driven, with no seals to wear or leak. Powerful and durable, these high-quality pumps are designed and built for years of continuous use.
The Iwaki RLT series pumps are recommended for pressure setups, as they handle back pressure well.
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Features
- For In-line use only
- Freshwater or saltwater
- Handles back pressure well- recommended for high head heights or for canister filtration systems
- Internal cooling circuit- Hollow rotating spindle creates a positive, forced cooling path. This lubricates bearing surfaces and actively purges gases and heat to dramatically extend bearing life.
- Drive magnet- Dynamically balanced, barium ferrite drive magnets provide the best magnet torque, dollar-for-dollar! The die-case magnet carrier also creates a flywheel effect, which further adds to the magnet safety factor.
- Impeller- Bored, tuned, and highly polished, this precision-machined spindle forms the center of the magnet, and great pains are taken in the molding/finishing process to eliminate misalignment. This process ensures consistent performance and substantially reduced operating noise.
- Motor matching- The large selection of Iwaki Magnetic Drive Pumps means you can tailor your pump specifically to your aquarium's needs! The totally enclosed, permanent split capacitor motors are compact, cool, and economical.
- Bearings- Special high-lubricity, fluoropolymer bearings maximize mechanical performance versus conventional Magnetic drive pumps. High-purity silicon carbide radial bearings withstand even the most aggressive "ultra-pure" chemistries.
- Thrust surfaces- PTFE front thrust surface aids hydraulic balance. Large rear thrust surface protects against axial forces that are created by cavitations or gas entrainment. The silicon carbide surfaces are "channeled" so that they remain wet, even under adverse operating conditions.
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Installation Tips
- Using an in-line pump with a wet/dry filtration system: Water flows via gravity from the aquarium into the wet/dry filter, and then into the filter's sump. From the sump, it flows into the pump via gravity through a bulkhead installed in the side of the sump. The pump sends water back up into aquarium from the wet/dry filter's sump. When installing pumps with wet/dry filtration, you'll need to drill into the filter's sump to install the bulkhead, then mount the pump level to the bottom of the filter's sump. You need to siphon water into the pump before turning it on.
- Using an in-line pump with canister filtration: Water moves via gravity from the aquarium into the pump. The pump pushes the water through the canister filters, and back up into the aquarium (or UV filter, chiller, etc.). You need to siphon water from the aquarium and flood the pump before turning it on.
- Never restrict the inlet flow of any water pump. This will quickly cause permanent motor damage.
- You can restrict the outlet flow of the water pump with a ball valve in order to achieve the desired flow rate.
- Use ball valves before inlet and after outlet to make pump removal easy and spill free.
- Anytime a threaded connection is used, be sure to use Teflon tape. When using barb insert connections to flexible tubing, use hose clamps. (Plastic hose clamps are required for underwater use.)
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Maintenance Tips
All water pumps benefit from a regular cleaning. Check the manufacturer's instructions as to how often maintenance should be performed on your particular pump.
Basic Cleaning Steps:
- Remove the pump from the system.
- Remove filter from the front of submerged pumps and remove debris. Rinse with plain fresh water (no soap).
- Remove the impeller housing cover to expose the impeller.
- Remove the impeller and the magnet. Inspect them for damage and wash with plain fresh water (no soap or abrasives).
- Wash out the impeller housing with plain fresh water (no soap or abrasives).
Other Cleaning Tips:
- Some brands of in-line pumps require periodic oiling to lubricate the motor. Always refer to your owner's manual for instructions on this procedure.
- If you have lime or mineral buildup on any part of your pump, you can dissolve these with Lime Off, a product especially designed for removing lime, salt residue, and other hard deposits on aquarium equipment. Make sure to rinse thoroughly with fresh clean water before reassembling your pump.
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Warranty
Return of electrical equipment to Drs. Foster & Smith for exchange or refund is limited to 60 days from the date of purchase. Beyond 60 days, electrical equipment is covered by the manufacturer's warranty and should be returned directly to Iwaki Walchem Corporation.
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