Does this fit clean and clear plus 520?

Yes, it is universal. It will have threads on it, but will slide over the pipe.

What is the purpose of specific purpose of this and how do you know if it's working properly?

he air relief valve, a.k.a the bleeder valve, bleeds trapped air from the pool filter. In practice, it’s meant to be opened after you start the pool pump, to release air trapped at the top of the filter tank. Close the valve knob once water starts to spray out of the valve.

Is there a spring that goes with this filter? I seem to have misplaced mine. Will no spring affect how it works?

This screen cap replacement part does not come with that compression spring which is actually attached to the filter manifold. I believe you can buy that as a separate replacement part for Pentair part #178616. I believe the spring is necessary to keep the screen cap in place on the air bleed tube and to keep the fine mesh top from getting crushed by the Pentair filter housing.

How to remove the old one from the tube? Mine seems glued.

It shouldn't be glued to the tube, just pull it off!

Pentair 190106z Air Bleeder For Easyclean D E Filter

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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₩39352

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Description

💧 Keep your pool pristine with Pentair’s precision air bleeder – because your oasis deserves the best!

DURABLE BUILD - Crafted from robust plastic materials designed to withstand poolside conditions and deliver long-lasting reliability.
COMPACT LIGHTWEIGHT - Measuring just 4 x 2 x 2 inches and weighing only 1 pound, it fits discreetly without adding bulk to your filtration system.
TRUSTED BRAND QUALITY - From Pentair, the global leader in aquatic equipment, guaranteeing innovation and energy-efficient design you can rely on.
SEAMLESS COMPATIBILITY - Engineered as a perfect replacement for Pentair Easyclean D.E. filters, ensuring hassle-free installation and peak performance.
EFFORTLESS MAINTENANCE UPGRADE - Enhances your pool’s filtration by efficiently bleeding trapped air, making pool care smoother and your water crystal clear.

The Pentair 190106Z Air Bleeder is a high-performance, durable replacement screen cap designed specifically for Easyclean D.E. pool filters. Compact and lightweight, it optimizes filtration by efficiently releasing trapped air, ensuring smoother pool maintenance. Backed by Pentair’s reputation for innovation and reliability, this part is essential for pool owners seeking hassle-free upkeep and crystal-clear water.

Specifications

ASIN	B071XHCVZ6
Batteries Included?	No
Brand	Pentair
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (383)
Date First Available	4 November 2017
Height	2 inches
Included Components	Pentair Rplcmt Screen Cap Pls Arbld
Is Discontinued By Manufacturer	No
Item model number	190106Z
Length	4 inches
Manufacturer	Pentair
Material Type	Plastic
Number of Items	1
Power Source	manual
Product Dimensions	10.16 x 5.08 x 5.08 cm; 20 g
Weight	1 Pounds
Width	2 inches

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