Bend Pre-filter

• Introduction

Yunnl elbow‑type spin‑down pre‑filter is installed on the main water supply line right after the water meter. Built with forged brass housing and precision stainless steel filter mesh, it adopts centrifugal spin‑down sediment separation combined with physical mesh interception. This whole‑house pre‑treatment filter traps sand, rust particles and other large sediment impurities from incoming tap water. It effectively protects downstream plumbing pipes, water heaters, boilers, HVAC units and household water appliances, extending equipment service life and reducing maintenance cost.

• Core Product Positioning

This 90° angled pre‑filter solves installation difficulties for narrow and compact plumbing spaces. As a reusable spin‑down pre‑filter, no filter cartridge replacement is required; regular flushing removes accumulated sediment. Suitable for residential whole‑house water supply and light‑duty commercial water treatment projects.

• Space‑Saving 90° Elbow Structure

Unique 90‑degree angled body design adapts to confined pipe corners and tight installation spaces. Optimizes layout for limited utility room pipework without extra pipe fittings, simplifies on‑site plumbing arrangement.

• Tool‑Free Quick Flush Drain System

Comes with bottom drain valve and tethered drain cap to avoid losing cap during maintenance. Simply open the drain valve to discharge trapped sediment without disassembling the filter. Fast cleaning lowers routine maintenance workload.

• Heavy‑Duty Forged Brass Construction

Robust forged brass main body, high pressure resistance and excellent corrosion resistance. Stable long‑term performance under household and HVAC circulating water systems. Marked with clear flow‑direction arrow on housing to prevent reverse installation and guarantee consistent filtration performance.

• Precision Stainless Steel Filter Mesh

Internal high‑precision stainless‑steel micropore screen intercepts large‑particle sediment. Reusable mesh can be rinsed repeatedly, no consumable filter elements needed, lowers long‑term operating expenses.

• Simple Thread‑In Installation

Standard G1 inch threaded connections for fast assembly with industry‑standard pipelines. No special tools demanded, suitable for new plumbing installation and retrofitting of existing water supply systems.

Centrifugal Spin‑Down Filtration

When raw tap water enters the elbow pre‑filter, the internal flow channel generates centrifugal swirling force. Heavy sediment such as sand and rust is spun down and collected at the bottom sediment chamber. Remaining fine large‑size impurities are physically blocked by the stainless‑steel precision filter mesh. Sediment settles in the lower cavity and can be flushed out directly through the bottom drain outlet. Clean water flows out toward downstream pipelines. The reusable filter screen does not require frequent replacement.

• Residential Household Applications

1. New house plumbing renovation: Main‑line pre‑treatment to protect household water‑using appliances
2. Old community water quality upgrade: Filter rust and sediment from aging water pipes
3. Pre‑treatment unit working together with water purifiers, softeners, water heaters and boilers
4. Villa & townhouse whole‑house water supply system

• Light‑Duty Commercial & HVAC Projects

1. Small offices, guesthouses and serviced apartments
2. Retail stores, barbershops, small‑scale public facilities with basic water pre‑filtration requirements
3. HVAC circulating water systems, heat pump pre‑filtration protection
4. Small commercial building main water inlet pre‑treatment

1. Installation Notes

1. Install on main water pipeline after water meter, follow the flow‑direction arrow marked on filter housing. Do not install backwards.
2. Ensure sufficient space below the drain valve for sediment flushing operation.
3. Use PTFE tape for threaded joints to guarantee leak‑free connection.
4. This product works for cold‑water main‑line filtration.

2. Routine Maintenance Steps

1. Open the bottom drain valve periodically; water flow will flush sediment out of the sediment chamber.
2. Close drain valve after flushing completes. The tethered drain cap stays attached and will not get lost.
3. For heavy sediment conditions, disassemble and rinse the stainless‑steel filter mesh to restore flow capacity. No replacement of filter cartridge needed.

All Yunnl brass plumbing hardware undergoes factory pressure and leak‑testing before shipment. This elbow spin‑down filter targets installers, plumbing distributors and system integrators across global markets. Sample evaluation and project bulk orders are both accepted.

Yunnl DN25 90‑Degree Elbow Spin‑Down Water Pre‑filter is a forged‑brass main‑line sediment pre‑treatment unit. Its compact angled design fits narrow plumbing spaces. Centrifugal spin‑down filtration plus stainless steel mesh intercepts sand and rust, with tool‑free flushing for easy maintenance. Widely used in residential whole‑house water supply and light‑duty commercial / HVAC projects. Sample available, fast 15‑day lead‑time for global plumbing buyers.