LGQF-LL 4 Inch 90 Degree Long Sweep PVC Vent Cap for Furnace, Roof, Drain & Pool Pipe Terminations with 304 Stainless Steel Screen
LGQF-LL 4 Inch 90 Degree Long Sweep PVC Vent Cap for Furnace, Roof, Drain & Pool Pipe Terminations with 304 Stainless Steel Screen
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Need a Full 90 Degree Turn but Have Room for a Wider Curve?
A 4-inch outdoor PVC opening may need to turn completely away from its original direction while remaining visibly open and protected from larger unwanted material. The challenge is choosing the right 90-degree shape—not simply buying the first elbow-shaped cap that looks close.
The LGQF-LL 4 Inch 90 Degree Long Sweep PVC Vent Cap combines a wider 90-degree curve, an outer-fit lower socket and a fixed 304 stainless steel screen. It is a final screened termination, not a sealed cap, valve or ordinary elbow for extending another pipe.
Confirm What You Are Looking At
The images below establish the product identity, dimensions and wider 90-degree curve. The lower socket connects over the pipe exterior. The screened end remains the final open outlet.
What “90 Degree Long Sweep” Means
The product changes the outlet direction by 90 degrees over a wider curve. That description is about physical geometry. It does not, by itself, prove a specific airflow improvement, pressure reduction, drainage improvement or efficiency gain.
A Wider 90° Curve
The curve extends farther from the pipe than the compact standard 90-degree model. Available space is therefore part of fitment.
A Fixed Screened Outlet
The 304 stainless steel screen helps deter birds, rodents, insects, leaves and larger outdoor debris while keeping the termination visibly open.
One Finished Termination
Where this exact shape is permitted, the 90-degree curve and screen are combined in one product. The screened end is not a coupling for another pipe.
Measure the Pipe Before Ordering
This is an outer-fit product. The lower socket pushes over the outside of compatible 4-inch Schedule 40 PVC pipe. It does not insert inside the pipe opening.
- Nominal pipe size: 4 inches
- Typical compatible pipe OD: approximately 4.5 inches
- Product fit opening shown in the current image: approximately 4.53 inches
- Product outer rim shown in the current image: approximately 5.04 inches
- Fit style: outer-fit / push-on lower socket
Measure the outside diameter of the existing pipe. “4 inch” is the nominal pipe size, not its exact exterior measurement. If your pipe is materially different from approximately 4.5 inches OD, confirm its standard before ordering.
Picture the Final Direction
The same product creates a different outlet orientation depending on the existing pipe:
- On a horizontal sidewall pipe, the outlet may be rotated downward when that orientation is permitted.
- On a vertical roof pipe, the outlet becomes horizontal or side-facing—not downward-facing.
- Leave clearance for the complete wider curve, the approximately 5.04-inch outlet rim, walls, roofing, nearby pipes and future inspection.
This Product May Fit When
- The existing pipe is compatible PVC
- The nominal size is 4 inches
- The measured pipe OD is approximately 4.5 inches
- An outer-fit socket can slide over the pipe
- A full 90-degree Long Sweep shape is permitted
- There is room for the extended curve
- A fixed screen is permitted at the final outlet
Do Not Assume It Fits When
- The pipe is metal, flexible, corrugated or thin-wall
- The actual pipe OD has not been measured
- You need a compact standard 90-degree body
- You need only a 45-degree direction change
- You need a sealed cap, damper or valve
- The system prohibits a screen or this geometry
- The opening carries pressurized discharge
Where This 4 Inch Long Sweep Termination May Be Used
These are possible application categories, not universal approvals. Confirm the actual system requirements before installation.
Furnace Intake or Exhaust
May be used only when the furnace manufacturer permits the 4-inch pipe size, 90-degree Long Sweep geometry and a fixed screen. Confirm equivalent vent length, airflow, clearances and condensate behavior.
PVC Roof Termination
May suit an approved vertical PVC roof pipe when a side-facing screened outlet is permitted. This product is not roof flashing, a roof fan or a complete roof-penetration system.
Drain, Overflow or Pool Line
May suit an approved non-pressurized outdoor drain, overflow or pool backwash-related opening when the screen and curve will not interfere with the required water or solids path. It is not a pump or pressure fitting.
Important Safety and Performance Boundary
- Long Sweep describes the physical curve. Do not claim a guaranteed reduction in turbulence, pressure loss, clogging, condensation or energy use without system-specific testing.
- A fixed screen reduces the open area. Never describe the termination as “no restriction,” “full airflow” or “no back pressure.”
- A downward-facing sidewall orientation may reduce direct exposure, but the product does not guarantee prevention of rain, snow, reverse flow, flooding or freezing.
- This product is not a backdraft damper, check valve, backflow preventer, sealed end cap, roof flashing, exhaust fan, drain grate, pump adapter or pressure-rated discharge component.
- Do not use it on metal flues, chimneys, dryer vents, flexible ducts or systems outside the PVC body's permitted temperature and chemical limits.
- Keep the outlet visible and accessible for inspection and cleaning.
What Real Installations Teach Us
The Name on the Pipe Is Not the Measurement
A nominal 4-inch Schedule 40 PVC pipe is commonly about 4.5 inches outside. Measuring the exterior—not guessing from the label—is the fastest way to avoid receiving a part that cannot slide over the pipe.
The Wider Bend Needs Real Space
Long Sweep and standard 90-degree models can look similar in a shopping thumbnail. At the wall or roof, the Long Sweep reaches farther. Nearby siding, flashing, equipment and service access can decide which version actually fits.
“Downward” Depends on the Existing Pipe
A horizontal sidewall pipe can allow the outlet to rotate downward. A vertical roof pipe produces a side-facing outlet. Careful buyers work out that final direction before selecting the shape.
The Screen Is Not Maintenance-Free
Stainless steel helps with outdoor durability, but the screen can still collect leaves, insects, frost or system-specific residue. It should remain easy to see, reach and clean.
Read real homeowner PVC vent protection experiences and learn how birds and debris can enter exposed PVC openings.
Confidence Comes From Knowing the Boundaries
Function
A wider 90-degree curve, outer-fit socket and fixed 304 stainless steel screen in one finished PVC termination.
Peace of Mind
You can check diameter, direction, installation space and system approval before the product arrives.
For Careful Owners and Installers
The right part is chosen by measurement and system requirements—not by unsupported claims about perfect airflow or permanent protection.
Product Specifications
| Brand | LGQF-LL |
|---|---|
| Product | 4 Inch 90 Degree Long Sweep PVC Vent Cap with Screen |
| Nominal Pipe Size | 4 Inch |
| Compatible Pipe | Compatible 4 Inch Schedule 40 PVC; verify actual dimensions |
| Approximate Compatible Pipe OD | 4.5 Inches |
| Approximate Product Fit Opening | 4.53 Inches, as shown in the current dimension image |
| Approximate Outer Rim | 5.04 Inches, as shown in the current dimension image |
| Configuration | 90 Degree Long Sweep / wider curved body |
| Fit Type | Outer-fit / push-on lower socket |
| Body Material | PVC |
| Screen Material | 304 Stainless Steel |
| Color | White |
| GTIN / UPC | 037936449047 |
| Shopify Variant ID | 51223607378212 |
| Amazon ASIN / SKU | B0DW8F3PYK |
| Current Price | $32.99 USD |
Compare the 4 Inch Shapes
0° Straight Screen Cap
For a straight screened outlet without a directional bend.
View the 4-inch 0° model45° Long Sweep
For a wider 45-degree curve when only a partial direction change is needed.
View the 4-inch 45° Long Sweep90° Long Sweep — This Model
For a full 90-degree change with a wider curve and more required clearance.
Complete Shape Guide
Compare straight, 45-degree, 90-degree and return-bend termination shapes.
Read the PVC vent cap shape guideLearn Before You Install
- Complete LGQF-LL PVC Vent Protection Guide
- Furnace intake and exhaust termination planning guide
- PVC roof vent cap and screen protection guide
- What a pool backwash-line installation teaches about screened outlets
Frequently Asked Questions
What pipe does this 4 inch Long Sweep vent cap fit?
It is designed as an outer-fit termination for compatible 4-inch Schedule 40 PVC pipe measuring approximately 4.5 inches outside diameter. Measure the actual pipe before ordering.
Does it insert inside the PVC pipe?
No. The lower socket pushes over the outside of compatible pipe. It is not an internal insert-style screen.
What does the 4.53-inch measurement mean?
The current dimension image shows the product fit opening at approximately 4.53 inches. It is intended to slide over compatible PVC pipe measuring approximately 4.5 inches OD.
How is it different from the standard 90 degree model?
The Long Sweep model changes direction over a wider curve and requires more clearance. The standard 90-degree model is more compact.
Does Long Sweep guarantee lower airflow resistance?
No universal performance claim should be made without testing in the actual system. Long Sweep describes the physical curve, not a guaranteed airflow, pressure or efficiency result.
Can another pipe connect to the screened end?
No. The screened end is the finished open termination. It is not a second coupling socket.
Can it be used on a furnace intake or exhaust pipe?
Only when the furnace manufacturer permits the 4-inch pipe size, 90-degree Long Sweep geometry and a fixed screen. Confirm equivalent vent length, airflow, condensate behavior and clearances.
Can it be used on a PVC roof vent?
It may suit an approved vertical PVC roof termination when a horizontal or side-facing screened outlet is permitted. It is not roof flashing, a roof fan or a complete roof-penetration system.
Can it be used for an outdoor drain or pool line?
It may suit an approved non-pressurized drain, overflow, backwash or pool-related opening when the screen and curve will not interfere with the required flow or solids passage. It is not a pressure-rated discharge fitting.
Is it a sump pump discharge adapter?
No. It is a screened PVC termination, not a pump, hose, adapter, quick connector or valve. Do not use it where pressurized pump discharge or unrestricted solids passage is required unless expressly approved.
Does it prevent rain or backflow?
No. A downward-facing sidewall orientation may reduce direct exposure, but the product is not a backflow-prevention device and cannot guarantee protection from wind-driven rain, flooding or reverse flow.
Does the screen provide unrestricted airflow?
No screen should be described as unrestricted. Verify the available screen area and the system's airflow or water-flow requirements.
Will it prevent condensation or freezing?
No. Condensation and freezing depend on temperature, wind, moisture, system operation, pipe placement and other conditions. This product does not guarantee their prevention.
Can it be used on metal duct or flexible dryer vent?
No. It is intended for compatible PVC pipe and is not designed for metal duct, chimney flue or flexible dryer vent.
Does the stainless steel screen require maintenance?
Yes. Inspect it periodically and remove accumulated leaves, insects, frost or other material according to the appliance or system maintenance requirements.
Measure the Pipe and the Available Space
Confirm approximately 4.5-inch pipe OD, picture the final 90-degree outlet direction and make sure the wider curve fits before ordering.
Current listed price: $32.99 USD. Price, availability and shipping may change.
