LGQF-LL 4 Inch 90 Degree PVC Vent Cap for Furnace, Roof, Drain & Pool Pipe Terminations with 304 Stainless Steel Screen
LGQF-LL 4 Inch 90 Degree PVC Vent Cap for Furnace, Roof, Drain & Pool Pipe Terminations with 304 Stainless Steel Screen
Couldn't load pickup availability
Need to Turn a 4 Inch PVC Opening 90 Degrees and Keep Larger Debris Out?
An exposed 4-inch PVC pipe can leave a wide opening for birds, rodents, insects, leaves and wind-carried debris. Sometimes the pipe also needs a full 90-degree change in direction before it reaches its final screened outlet.
The LGQF-LL 4 Inch 90 Degree PVC Vent Cap combines a standard tight-radius 90-degree body with a fixed 304 stainless steel screen. Its lower socket pushes over compatible 4-inch Schedule 40 PVC pipe, while the opposite end remains the screened outlet.
See the Product Before You Decide
The images below show the actual 4-inch 90-degree body, the outer-fit sizing and the fixed screened outlet. The screen is the finished end of the product; it is not another socket for connecting a second pipe.
What This 90 Degree PVC Vent Cap Actually Does
This is a screened PVC termination with a full 90-degree change in direction. It is meant to finish a compatible pipe opening—not to seal the pipe and not to act as a valve.
Changes Outlet Direction
The standard 90-degree body changes the direction of the final outlet in a compact space. When installed on a horizontal sidewall pipe, it may be rotated to face downward if the system instructions permit that orientation.
Helps Deter Larger Intrusion
The fixed 304 stainless steel screen helps deter birds, rodents, insects, leaves and larger debris while leaving an open path through the termination.
Replaces a Separate Elbow
Where this screened shape is permitted as the final termination, the one-piece body can provide the 90-degree turn and screened outlet without adding a separate elbow and screen cap.
Confirm the Fit 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 actual outside diameter of your pipe with a tape or caliper. “4 inch” is the nominal pipe size; it does not mean the outside of the pipe measures exactly 4 inches.
Orientation Matters as Much as Diameter
A 90-degree fitting changes direction relative to the existing pipe:
- On a horizontal sidewall pipe, the outlet may be rotated downward when the appliance or system instructions permit it.
- On a vertical roof pipe, the outlet becomes side-facing rather than downward-facing.
- Leave room for the body, the approximately 5.04-inch outer rim, nearby walls, roofing, siding 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 compact 90-degree direction change is needed
- A fixed screen is permitted at the final outlet
- The opening remains accessible for inspection
Do Not Assume It Fits When
- The pipe is metal, flexible, thin-wall or corrugated
- The pipe OD has not been measured
- You need an internal insert-style cap
- You need a sealed end cap or ordinary plumbing fitting
- You need a damper, valve or backflow device
- The system prohibits a screen or 90-degree termination
- The opening carries pressurized discharge
Where This 4 Inch Screened Termination May Be Used
The correct application depends on the system—not just the pipe diameter. Treat the examples below as fitment categories that still require approval, not universal installation permission.
Furnace Intake or Exhaust
May be used on a compatible PVC furnace termination only when the appliance manufacturer permits the pipe size, 90-degree geometry and screen. Confirm airflow, equivalent-length calculations, clearances and condensate behavior.
PVC Roof Termination
May be used on an approved vertical PVC roof pipe when a side-facing screened outlet is permitted. This product is not roof flashing, a roof fan, a turbine vent or a substitute for watertight roof penetration details.
Drain, Overflow or Pool Line
May suit an approved non-pressurized outdoor drain, overflow or pool backwash-related opening when the screen will not trap required solids or restrict the required water path. It is not a grate, pump, hose or pressure fitting.
Important Safety and System Boundary
- A screen changes the open area. Never describe this product as “no restriction” or assume it is acceptable for every furnace, drain or pool system.
- The 90-degree shape helps change direction and may reduce direct exposure in some orientations, but it does not guarantee that rain, snow, wind-driven water, backflow, flooding or freezing will be prevented.
- This product is not a backdraft damper, check valve, backflow preventer, relief valve, sealed cap, roof flashing, exhaust fan, pump adapter or pressure-rated discharge component.
- Do not use it on metal flues, chimneys, dryer vents, flexible ducts or any pipe carrying temperatures or chemicals outside the material's approved limits.
- Keep the screen accessible. Outdoor screens require periodic inspection and cleaning.
- Follow the appliance or system manufacturer's instructions, local codes and qualified-professional guidance.
What Real Installations Teach Us
Most Fit Problems Begin With the Nominal Size
A customer may see “4 inch” on a pipe and expect the outside to measure 4 inches. Schedule 40 PVC is different: the common outside diameter is about 4.5 inches. Measuring before ordering is the simplest way to avoid receiving the right product category in the wrong physical size.
The Next Question Is Direction, Not Just Angle
A 90-degree product does not always point downward. It points 90 degrees away from the existing pipe. Sidewall and roof installations therefore create different final outlet directions. A careful installer checks the complete position before fastening anything.
A Screen Is a Maintenance Part
The screen helps keep larger unwanted material out, but the same screen can collect lint, leaves, frost or other debris depending on the system and environment. A termination that cannot be seen or reached cannot be maintained properly.
For more context, read real homeowner PVC vent protection experiences and how birds and debris can enter exposed PVC pipe openings.
Protection You Can Understand Before You Buy
Function
A compact 90-degree direction change, an outer-fit connection and a fixed stainless steel screen in one finished termination.
Peace of Mind
You know what the product fits, what the screen does and where its limits begin before you place the order.
For Careful Owners and Installers
The right choice comes from measuring the actual pipe, checking the system instructions and planning for inspection—not from guessing by appearance.
Product Specifications
| Brand | LGQF-LL |
|---|---|
| Product | 4 Inch 90 Degree 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 | Standard tight-radius 90-degree turn |
| Fit Type | Outer-fit / push-on lower socket |
| Body Material | PVC |
| Screen Material | 304 Stainless Steel |
| Color | White |
| GTIN / UPC | 081904961505 |
| Shopify Variant ID | 51223232708900 |
| Amazon ASIN / SKU | B0DLVMHWB4 |
| Current Price | $20.99 USD |
Choose the Shape That Matches the Opening
0° Straight Screen Cap
For a straight screened opening without a directional turn.
View the 4-inch 0° model45° Long Sweep
For a 45-degree turn with a wider-radius body and more required clearance.
View the 4-inch 45° Long Sweep90° Standard — This Model
For a compact full 90-degree change in direction with a screened outlet.
90° Long Sweep
For a full 90-degree direction change with a wider bend and more clearance.
View the 4-inch 90° Long SweepComplete 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 pool backwash-line installations teach about screened outlets
Frequently Asked Questions
What pipe does this 4 inch vent cap fit?
It is designed as an outer-fit termination for compatible 4-inch Schedule 40 PVC pipe with an outside diameter of approximately 4.5 inches. Measure your 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 cap.
What does the 4.53-inch measurement mean?
The current dimension image shows the product fit opening at approximately 4.53 inches. That opening is intended to fit over compatible PVC pipe with an outside diameter of approximately 4.5 inches.
Can another pipe connect to the screened end?
No. The screened end is the finished outlet. It should remain open and accessible; it is not a second coupling socket.
Is this the 4 inch Long Sweep 90 Degree model?
No. This product is the standard compact 90-degree model. The Long Sweep version uses a wider bend radius and needs more installation clearance.
Can it be used on a furnace intake or exhaust pipe?
Only when the appliance manufacturer permits the 4-inch pipe size, a screened termination and this 90-degree configuration. Required airflow, vent length, clearances and condensate behavior must be verified.
Can it be used on a PVC roof vent?
It may be suitable for an approved PVC roof termination when a 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 pipe?
It may suit an approved non-pressurized drain, overflow, backwash or pool-related pipe opening when the screen and 90-degree turn will not interfere with the required flow or solids. It is not a pressure-rated discharge fitting.
Is it a sump pump adapter or discharge kit?
No. It is a screened PVC termination, not a pump, adapter, hose, quick connector or valve. Do not use it where pressurized pump discharge or unrestricted solids passage is required unless the system designer expressly approves it.
Does it prevent rain or backflow?
No guaranteed prevention should be claimed. The 90-degree direction may reduce direct weather exposure in some orientations, but this product is not a backflow-prevention device and cannot stop all wind-driven rain, flooding or reverse flow.
Does the screen have zero airflow restriction?
No screen should be described as having zero restriction. Confirm the available screen area and the system manufacturer's airflow or water-flow requirements before installation.
Will it prevent the pipe from freezing?
No. Freezing can be affected by temperature, condensation, wind, snow, system operation and outlet placement. The product does not guarantee freeze prevention.
Is it suitable for metal duct or dryer vent?
No. It is intended for compatible PVC pipe and is not designed for metal duct, chimney flue or flexible dryer vent.
Does it require maintenance?
Yes. Inspect the outlet and screen regularly and remove accumulated leaves, insects, frost or other material according to the system's maintenance requirements.
Should I use glue?
Installation and retention requirements vary by system. Do not glue, screw or permanently alter a vent termination unless the pipe or appliance instructions and local requirements permit that method.
The Right Part Starts With a Measurement
Confirm approximately 4.5-inch pipe OD, confirm the 90-degree outlet direction and verify that a fixed screen is permitted. Then choose the model that matches the actual system.
Current listed price: $20.99 USD. Price, availability and shipping may change.
