does this unit have a check valve?

I don’t believe it does. Our plumber installed a separate, dedicated check valve elsewhere in our hot water loop.

Can this replace a 59896777 model?

You can call Grundfos or their reps but it could take days for them to return the call , that was my experience. The 5989676 is the same pump as the 5989677 without the timer or the check valve. If you have a need or desire for the timer get the "77" model the check valve is a nice to have feature but not essential and I already had on inline so the "76" pump worked fine. All specs otherwise are the same EXCEPT the water temp can be hotter if you do not have a timer. In household applications you should have the water hotter then 115F anyway so either pump is fine. Use this link to see all the detail and a table comparing the features. https://us.grundfos.com/products/find-product/circulators.html#brochures click on the UP(S) brochure. FYI these are not general hard to install but a good plumber can do it in less than an hour especially if they're swapping one out.

Is a stainless steel unit such as this able to be used in an open loop radiant system?

this unit will be able to do the pumping but there are so many other factors to consider you need to consult the engineer who designed the system.

which of the grunfos hot water recirculating pump has a brass impeller

Hi, I believe that model is # 595916. Although there are several, this is the most common.

Grundfos Up15 29su Lc 59896776

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

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B/.2627

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Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Elevate your home’s flow with power and precision!

PLUG PLAY - Comes with a convenient line cord for easy installation and immediate use.
BUILT TO LAST - Robust stainless steel construction ensures long-lasting durability and corrosion resistance.
PRECISION POWER - 1/8 HP motor delivers reliable, energy-efficient circulation for your home systems.
COMPACT EFFICIENCY - Slim 1-1/4" union design fits seamlessly into tight spaces without compromising performance.
TRUSTED PERFORMANCE - Highly rated by professionals with a 4.6-star average from 147 reviews—join the satisfied users!

The GRUNDFOS UP15-29SU/LC is a compact, stainless steel circulator pump featuring a 1/8 HP motor and 115V power supply. Designed for efficient and durable home water circulation, it includes a 1-1/4" union and a convenient line cord for easy installation. Trusted by professionals and backed by strong customer ratings, this pump combines reliability with sleek engineering to keep your systems running smoothly.

Specifications

ASIN	B003A6WUGI
Amazon.co.jp での取り扱い開始日	2014/9/9
おすすめ度	4.5 5つ星のうち4.5 (151) var
ブランド	Grundfos
商品の重量	2.36 Kilograms
材質	ステンレス鋼
色	ホワイト
表札の名字	サーキュレーターポンプ
製品サイズ	0.2 x 15.24 x 17.78 cm; 2.36 kg
製品型番	59896776
電圧	115 ボルト
電池付属	いいえ
電源	バッテリー式

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B/.2627

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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GRUNDFOS UP15-29SU/LC 59896776

Description

Specifications

Common Questions