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Douglas Square Ground Sleeve T-Plugs

Original price $49.00 - Original price $59.00
Original price
$49.00
$49.00 - $59.00
Current price $49.00
In stock
SKU: 63420
Size: 3 sq
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$100 OFF ALL ORDERS $2000 & UP

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Product Overview
In short
Douglas Square Ground Sleeve T-Plugs are black powder coated steel plugs that insert into square ground sleeves to keep dirt and debris out when posts are removed. They are sold individually in three sizes (3" SQ, 3.5", 4") that must be matched to the corresponding ground sleeve or post system.
✓ Authorized Douglas Dealer — ships brand-new with the full factory warranty

Square Ground Sleeve T-Plugs are designed to protect exposed ground sleeves from dirt and debris buildup when tennis or volleyball posts are removed, such as during winterization or on multi-purpose courts where posts aren't always in use. Constructed from black powder coated steel, each plug features a top plate that is 1/8 in. thick with rounded edges and corners for durability and safety.

T-Plugs are sold individually and are available in three sizes: 3" SQ, 3.5", and 4". Each size is matched to specific Douglas ground sleeves and net/post systems, including the GS-24SQ, GS-36SQ, and GS-42SQ ground sleeves, as well as Douglas Premier SQ Tennis Posts and various Douglas Volleyball and Adjustable Net Systems.

Specifications
SpecificationValue
MaterialBlack powder coated steel
Top Plate Thickness1/8 in. thick with rounded edges and corners
Available options3" SQ, 3.5", 4"
Sold AsIndividually
UseWinterization or multi-purpose courts when posts aren't in use
3 in. FitsGS-24SQ 24 in. Aluminum/Steel Ground Sleeves, GS-36SQ 36 in. Steel Ground Sleeves, Douglas Premier SQ Tennis Posts, Douglas 3 in. SQ Volleyball System
3.5 in. FitsGS-42SQ 42 in. Steel Ground Sleeves, Douglas 3.5 in. Adjustable Net System, Douglas 3.5 in. In-line Net System, Douglas 3.5 in. Volleyball System
4 in. FitsGS-24SQ 24 in. Aluminum Ground Sleeves, GS-36SQ 36 in. Aluminum Ground Sleeves, Douglas 4 in. Aluminum Adjustable Net System, Douglas 4 in. In-line Net System, Douglas 4 in. Volleyball System
CategoryGround Sleeves, Replacement Parts
Compare Douglas models
PVC Round 24
Alum. Round 24
Galv. Round 24
Alum. 4in SQ 24
Sand Steel 36
Steel SQ 42
Material
PVC
Material
Aluminum
Material
Galvanized steel
Material
Aluminum
Material
Steel
Material
Steel
Length
24 in.
Length
24 in.
Length
24 in.
Length
24 in.
Length
36 in.
Length
42 in.
Post Profile
Round
Post Profile
Round
Post Profile
Round
Post Profile
Square
Post Profile
Square
Post Profile
Square
Fits Post Size
2-7/8 in. OD
Fits Post Size
2-7/8 in. OD
Fits Post Size
3 in. OD round posts
Fits Post Size
4 in. SQ posts
Fits Post Size
3 in. SQ posts
Fits Post Size
3.5 in. SQ posts
Size Options
Size Options
Size Options
Size Options
Size Options
Size Options
Collars Included
Collars Included
Collars Included
Collars Included
Collars Included
Yes — collars for sand volleyball
Collars Included
End Plugs Included
End plugs
End Plugs Included
PVC end plugs
End Plugs Included
PVC end plugs
End Plugs Included
End Plugs Included
End Plugs Included
Sold As
Pair
Sold As
Pair
Sold As
Pair
Sold As
Sold As
Pairs
Sold As
Primary Application
New construction ground sleeves
Primary Application
POP tennis / round net post installs
Primary Application
Round net post installations
Primary Application
Volleyball
Primary Application
Sand volleyball
Primary Application
Volleyball
Color / Finish
Color / Finish
Color / Finish
Galvanized
Color / Finish
Color / Finish
Black
Color / Finish
Black
Ship Weight
5 lbs
Ship Weight
8 lbs
Ship Weight
10 lbs
Ship Weight
10 lbs
Ship Weight
52 lbs
Ship Weight
67 lbs
Best for
New construction projects seeking the most economical round sleeve option.
Best for
Courts with 2-7/8 in. round posts wanting corrosion-resistant aluminum sleeves.
Best for
Installations using 3 in. OD round posts that need heavier galvanized sleeves.
Best for
Indoor or hard-court volleyball setups using 4 in. square posts.
Best for
Beach courts needing deep steel sleeves with collars for 3 in. square posts.
Best for
Deep-set installations for 3.5 in. square volleyball posts.
$69.00$69.00$79.00$99.00$229.00$339.00
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Shipping & Returns

We offer standard 1-5 business day shipping (following dispatch) via LTL Freight, FedEx, UPS, DHL, or USPS. Orders typically process in 1-2 business days (starting the following business day). Shipping rates are usually calculated at checkout; however, we reserve the right to provide custom shipping quotes for oversized or specialized equipment.

60-DAY NO-HASSLE REFUNDS AND RETURNS

If there’s an issue with your product, we make refunds and returns quick and easy.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused or unused, with tags, and in its original packaging. To contact us, email info@joysportstore.com

More information on shipping and returns can be found here.

Warranty

Douglas Industries, Inc. (Eldridge, Iowa) backs its equipment with the Douglas® Standard Limited Warranty against defects in material and factory workmanship. Coverage length depends on the product line — where a specific period is listed above, that period applies to this model. Douglas warranty periods run as follows:

  • Limited Lifetime – gooseneck basketball posts with 6' extension.
  • 25 years – gooseneck basketball posts with 4' extension.
  • 10 years – gooseneck posts with 3' extension; pro-rated structural warranty on Bakko and steel/aluminum backboards (1 year on the Imron® finish); selected post and net systems.
  • 7 years – Douglas® MAX batting tunnel frames (with proper installation and normal use).
  • 5 years – standard Douglas® batting tunnel frames, most tennis / volleyball / pickleball post systems and Premier™ posts; 5-year fade warranty on Sunbrella® canvas.
  • 4 years – VCP MAX windscreen mesh, #420 knotless pylon netting and other netting lines; fabrics are warranted pro-rata for 3–4 years against material defects and poor workmanship.
  • 3 years – selected fabric and netting products.
  • 2 years – selected hardware and padding.
  • 1 year – accessories, replacement parts and paint / finish coverage.

Digital printing on windscreen and vinyl products carries the same warranty as the underlying windscreen or vinyl material.

Not covered: improper installation, use other than intended, unauthorized alterations, abuse or misuse, normal wear, and damage from fire, flood, wind, lightning or leaving products outdoors beyond their intended seasonal use. As an authorized Douglas dealer, JoySportStore files warranty claims directly with the manufacturer on your behalf.

Frequently asked questions

How do I choose the correct T-Plug size?

Match the T-Plug size (3" SQ, 3.5", or 4") to your specific Douglas ground sleeve or post/net system, as each size fits a distinct set of products such as the GS-24SQ, GS-36SQ, GS-42SQ ground sleeves or the Douglas 3", 3.5", or 4" Volleyball and Net Systems.

What are these T-Plugs made of?

They are constructed from black powder coated steel with a top plate that is 1/8 in. thick, featuring rounded edges and corners.

Are these plugs sold individually or in sets?

T-Plugs are sold individually, so you will need to order the quantity matching the number of ground sleeves you want to cover.

Is JoySportStore an authorized Douglas dealer?

Yes. JoySportStore is an authorized Douglas dealer, so every product ships brand-new from the Douglas factory in Eldridge, Iowa with the full Douglas warranty and factory-backed support.