Submersible pump for Grundfos well: SPO, SQ, our website, SP


grundfos well devices

Liv­ing in a coun­try house is pure plea­sure. If not for some of the dif­fi­cul­ties that most home­own­ers have to face. And, first of all, this is the flood­ing of base­ments, base­ments and cel­lars dur­ing spring floods and heavy rain­fall, as well as water­ing a per­son­al plot, clean­ing your own pond or ditch and oth­er prob­lems asso­ci­at­ed with pump­ing liq­uids and mov­ing them over var­i­ous dis­tances.

The sim­plest and most ratio­nal solu­tion to these “top­i­cal” issues is to pur­chase a sub­mersible pump — a spe­cial device that oper­ates when locat­ed below the lev­el of the pumped liq­uid and pro­vides water sup­ply upwards and hor­i­zon­tal­ly. And one of the most suc­cess­ful options for such devices can be called a sub­mersible pump for a well with Grund­fos automa­tion, being the leader of sales in EU.

Main series and their purpose

Depend­ing on the design fea­tures and specifics of use, pump­ing devices of this brand are divid­ed into sev­er­al series:SPO devices

This range includes pumps equipped with a grate in the suc­tion sec­tion. Designed for pump­ing water from wells with a diam­e­ter of 5 — 6 inch­es, as well as from wells, pools and oth­er con­tain­ers.

This series is rep­re­sent­ed by three-stage and cen­trifu­gal mod­els, which can be oper­at­ed in wells with dif­fer­ent diam­e­ters. They are com­pact in size and easy to use.

SP type devices

Drainage type. They are used for pump­ing clean and pol­lut­ed water from reser­voirs. Suit­able for pump­ing liq­uids with solids up to 10 mm in diam­e­ter. They are light in weight and small in size. Suit­able for water­ing veg­etable gar­dens, orchards and vine­yards.

Series Mod­els Grund­fos SP, which are four-inch pumps, designed for pump­ing water with severe pol­lu­tion (with the pres­ence of sand in the com­po­si­tion up to 50 g/m3). They are dis­tin­guished by high pow­er, reach­ing up to 470 m3/ hour, and can raise the pumped water to a height of up to 670 m. Absolute­ly tight due to the use of sil­i­con car­bide for mechan­i­cal seals. Their only draw­back is their high price.

SQ Series Downhole Pump

Mod­els of this series are wide­ly used due to their reli­a­bil­i­ty, prac­ti­cal­i­ty and safe­ty.

Their main advan­tage is the pos­si­bil­i­ty of appli­ca­tion in wells of small diam­e­ter.


Options Indi­ca­tors
Per­for­mance 9 m3/hour
Dimen­sions 74 x 677…74 x 902
Work­ing volt­age 220 W
Per­mis­si­ble tem­per­a­ture of the pumped liq­uid Up to +40 degrees
Max­i­mum allow­able pres­sure 150 bar
Max­i­mum flu­id head 200 m
Nois­i­ness Less than 70 dB
Sol­id impu­ri­ties Not more than 50 g/m3

Design fea­tures:sq downhole devices

  • Pump body mate­r­i­al — alu­minum-cast iron alloy with anti-cor­ro­sion coat­ing. Oth­er parts of it are made of polyamide with the addi­tion of fiber­glass.
  • In the con­fig­u­ra­tion of the elec­tri­cal part of the engine there are per­ma­nent type mag­nets that increase its per­for­mance.
  • Thanks to the pres­ence of the upper thrust bear­ing, the impeller is pro­tect­ed from “lift­ing up” as a result of its dis­place­ment, in the case of pump oper­a­tion at low pres­sure.

Mod­els and prices:

Vari­eties Head, M Hg Flu­id speed Prices
SQ 1 — 35 Up to 50 1.7 m3/hour 38900
SQ 1 — 50 Up to 70 42100
SQ 1 — 65 Up to 85 45300
SQ1 — 80 Up to 118 54700
SQ 1 — 95 Up to 140 57000
SQ 1 — 110 Up to 167 59200
SQ 1 — 125 Up to 190 70500
SQ 1 — 140 up to 212 72900
SQ1 — 155 up to 238 75300
SQ 2 — 35 Up to 45 3.5 m3/hour 40200
SQ 2 — 55 Up to 68 42800
SQ 2 — 70 Up to 88 47400
SQ2-85 Up to 109 53100
SQ 2 — 100 Up to 132 65800
SQ2-115 Up to 155 68200
SQ 5 — 15 Before 18 7.5 m3/hour 38200
SQ 5 — 25 Up to 37 39900
SQ 5 — 35 Up to 54 47400
SQ 5 — 50 Up to 72 53100
SQ 5 — 60 Up to 88 68200
SQ 5 — 70 Up to 107 70400
SQ 7 — 15 up to 21 9 m3/hour 52500
SQ 7 — 30 Up to 43 57000
SQ 7 — 40 Up to 64 72900

Oth­er advan­tages of Grund­fos SQ units :

  • Avail­abil­i­ty of soft start sys­temwhich allows min­i­miz­ing loads dur­ing the start-up of the device, pro­vid­ing addi­tion­al pro­tec­tion of the engine against wear and dam­age.
  • The pres­ence of a ther­mal sen­sorpro­tect­ing the engine from over­heat­ing.
  • Pres­ence of fus­esallow­ing to pro­tect the pump from pos­si­ble drops in the net­work.
  • Equipped with dry run­ning sys­temwhich turns off the unit when there is not enough liq­uid in the source of its intake.

Video with a detailed overview of all the fea­tures of the SQ series pumps:

Features of the KR series

The equip­ment of this series is intend­ed for use in flood­ed premis­es and nat­ur­al con­di­tions.


Options Indi­ca­tors
Per­for­mance up to 12 m3/hour
Dimen­sions 149 x 149 x 225 and 158 x 158 x 225
Work­ing volt­age 300 W
Per­mis­si­ble tem­per­a­ture of the pumped liq­uid Up to +50 degrees
Max­i­mum flu­id head up to 5 m
Max­i­mum size of sol­id impu­ri­ties in liq­uid Up to 10 mm

Design fea­tures:

  • Man­u­fac­tured from stain­less chromi­um-nick­el steel high qual­i­ty and long ser­vice life.
  • Equipped with mesh to fil­ter incom­ing water flows.
  • The loca­tion of the dis­charge pipe is ver­ti­cal.

two kp devices

Mod­els and prices:

Vari­eties Head, M Hg Flu­id speed Prices, rub
KR 150 — M1 Up to 5.5 8.5 m3/hour 14600
KR 150 — A1 15600
KR 150 — AV1 16400
KR 250 — M1 Up to 7.5 11.5 m3/hour 17300
KR 250 — A1 18200
KR 250 — AV1 19100
KR 350 — M1 Up to 9.0 14.0 m3/hour 21900
KR 350 — A1 23500
KR 350 — AV1 26900

Mod­els marked A1 are equipped with a float switch. In pumps marked M, it is absent. The abbre­vi­a­tion AV1 stands for ver­ti­cal float switch. Addi­tion­al­ly, the device may include the Lift­away sys­tem, the cost of which, depend­ing on the mod­i­fi­ca­tion, is 15,300 — 55,7 dol­lars.

Feature of using Grundfos SPO

A dis­tinc­tive fea­ture of the equip­ment of this series is its ver­sa­til­i­ty. There­fore, the mod­els pre­sent­ed in it are invari­ably in great demand and are active­ly used to deliv­er water to hous­es from wells and bore­holes.


Options Indi­ca­tors
Per­for­mance 6.5 m3/hour
Work­ing volt­age 220 W
Per­mis­si­ble tem­per­a­ture of the pumped liq­uid +40 degrees
Max­i­mum liq­uid head 75 m
Per­mis­si­ble pres­sure 10 bar
Max­i­mum size of sol­id impu­ri­ties in liq­uid 10 mm

Design fea­tures:

  • The hydraulic part of the unit is made of stain­less steel.
  • The pres­ence of a grate on the suc­tion part allows you to take water from a low­er lev­el.
  • The sin­gle-phase elec­tric motor has a built-in capac­i­tor.

construction diagram and SPO drawing

Mod­els and prices:

Vari­eties Pow­er indi­ca­tors, W Flu­id speed Prices, rub.
SPO 3–40A 0.75 4.5 m3/hour 20760
SPO 3 — 50A 0.75 21160
SPO 3 — 65 A 1.0 22690
SPO 3 — 75A 1.2 24338
SPO 5–45A 0.75 6.4 m3/hour 21156
SPO 5 — 55 A 1.0 22690
SPO 5 — 70 A 1.2 24338


  • Instal­la­tion of the pump can be car­ried out “dry” or sub­mersible.
  • Can be installed at any angle, in hor­i­zon­tal and ver­ti­cal posi­tion. In this case, the receiv­ing grid should be below the lev­el of the upper out­let sec­tion of the pump.

Automation for Grundfos submersible pump

To max­i­mize the pow­er and func­tion­al­i­ty of Grund­fos sub­mersible pumps and make them more con­ve­nient to work with, com­plete with them, it is nec­es­sary to use auto­mat­ic instal­la­tions that pro­tect the device from volt­age surges, sud­den tem­per­a­ture fluc­tu­a­tions and dry run­ning.

It con­sists of:Pressure switch

  • Pres­sure switch;

Per­forms the func­tion of reg­u­lat­ing the oper­a­tion of the pump­ing unit, that is, turn­ing it on and off at a cer­tain pres­sure. It can have auto­mat­ic and man­u­al set­tings.

Cost: from 4 dol­lars. up to 5600 rub.

  • Lev­el sen­sor;

Designed to pro­tect the device from oper­a­tion in unnat­ur­al con­di­tions. For exam­ple, with a sharp shal­low­ing and a crit­i­cal decrease in the water lev­el in the source of the intake. Can be float and gal­van­ic.

Price: from 1010 rubles. up to 8900 rub.

  • Pres­sure meter.

Used to main­tain con­stant pres­sure. Cost: from 8 dol­lars. up to 5700 rub.

In addi­tion, addi­tion­al ele­ments may be includ­ed in the pack­age of the auto­mat­ic block, for exam­ple:

  • Dry run­ning sen­sors;
  • pipeline rup­ture con­trollers;
  • Tem­per­a­tures, etc.
At the moment, the third gen­er­a­tion of auto­mat­ic sys­tems has been released, which is dis­tin­guished by high pow­er and reli­a­bil­i­ty. True, com­plete with Grund­fos pumps, the price of such devices is quite high, but they work out the mon­ey spent on their pur­chase in full.

Sensor and control unitAutoma­tion con­nec­tion you can do it your­self like this:

  • After assem­bling the sys­tem, a hydraulic accu­mu­la­tor is installed on it.
  • A pres­sure switch is attached to it.
  • All ele­ments are con­nect­ed.
  • If nec­es­sary, the unit is con­nect­ed to the pow­er sup­ply.
  • The upper posi­tion of the relay is adjust­ed.
  • Sets the dif­fer­ence between the top and bot­tom posi­tions.
  • The sys­tem is test­ed in action, after which, if nec­es­sary, the set­tings are changed in the right direc­tion.

Control block

The main func­tions of this item – con­trol over the oper­a­tion of equip­ment in the sys­tem and reg­u­la­tion of its main para­me­ters. In addi­tion, it mon­i­tors the con­sumed elec­tric­i­ty, the speed and fre­quen­cy of rota­tion of the unit, con­trols its shut­down and re-start. It is a hinged device equipped with a door, which includes:

  • Auto­mat­ic type switch for pow­er sup­ply and over­load pro­tec­tion.
  • Cur­rent trans­form­ers.
  • Mag­net­ic type starter.
  • Con­trol node.
  • Microam­me­ter.

Can be sup­plied with pres­sure switch and float switch. Price: from 13600 rubles. up to 59000 rub.

Installation and installation

You can install a pump with a chop­per and a sub­mersible unit, with­out this device you can do it your­self, observ­ing safe­ty pre­cau­tions and the tech­no­log­i­cal sequence of the instal­la­tion process. In this case, the fol­low­ing actions are per­formed:

  • A non-return valve is installed on the pump noz­zlewhich pre­vents water from drain­ing when the pow­er is turned off.
  • A fil­ter is mount­ed on the suc­tion pipe.
  • Then comes pres­sure pipe con­nec­tionthrough which the water will move upwards.
  • A pow­er cable is passed through the injec­tion hose in a water­proof­ing braid, secur­ing it with clips.
  • A poly­mer twine is thread­ed through the brack­ets in the upper sec­tion of the body part, on which the pump will be held.
  • The unit is care­ful­ly low­ered into a well or well.
  • The rope is fixed on a brack­et locat­ed on the out­er part of the cas­ing pipe.

The pump instal­la­tion process is shown in more detail in the video:

The cost of instal­la­tion and main­te­nance of equip­ment:

Name price, rub.
Replace­ment of a sub­mersible pump in a well up to 100 m deep with a 133 mm cas­ing 15000
Replace­ment of a sub­mersible pump in a well with a depth of 100 to 150 m with a cas­ing string of 159 mm 20000–25000
Replace­ment of pump­ing equip­ment in the well 8000
Diag­nos­tics 3000

Start-up, adjust­ment and ver­i­fi­ca­tion of the set­tings of the auto­mat­ic part of the equip­ment are includ­ed in the total cost of work.


Con­sumer reviews tes­ti­fy to the high qual­i­ty, prac­ti­cal­i­ty and func­tion­al­i­ty of Grund­fos brand pumps. For exam­ple:

Pump Grundfos Unilift our website 150

unilift kp 150 a1

“The Grund­fos brand pump was bought for their dacha. And so far very sat­is­fied. From the pros I want to imme­di­ate­ly note:

— high-qual­i­ty mate­r­i­al of the body and com­po­nents;

– ver­sa­til­i­ty (suit­able for dirty water);

- low noise;

- light weight.

But it also has dis­ad­van­tages:

- due to the loca­tion of the holes 1 cm above the sur­face lev­el, it does not pump water com­plete­ly.

- the set does not include a fil­ter for screen­ing out small par­ti­cles. While, of course, he draws in any small debris, but you nev­er know …

That’s why I rate it a 4.

Ivan Sergee­vich, Sama­ra

Grundfos SP

“Decent man­u­fac­tur­er. An excel­lent pump for those who have their own well. We live in a cot­tage-type set­tle­ment, and we have been using the well for quite a long time.sp 17-7 When the old pump broke down, we decid­ed to replace it with Grund­fos of the SP series. It was, how­ev­er, not cheap. But we still “gath­ered our strength” and “forked up.” And almost imme­di­ate­ly they appre­ci­at­ed its advan­tages: good pro­tec­tion against sand and debris, pow­er, per­for­mance. Now we have no water short­ages, so we are very sat­is­fied. If it had been cheap­er, it would­n’t have been worth it. We hope it will jus­ti­fy the cost…”

Vic­tor, Nizh­ny Nov­gorod

Station Grundfos MQ 3–45

famous MQ 3-45“A worth­while thing if it weren’t for expen­sive repairs in case of a break­down. In case of fail­ure of the elec­tric motor or bear­ings, their replace­ment costs the same as a new unit. For rewind­ing the engine, they ask from 50 to 60 dol­lars, a set of o‑rings and rub­ber bands will cost about 80 euros. In gen­er­al, while it works — every­thing is super, but if it breaks — get ready for a decent cost … ”

Mikhail, world

Thus, eval­u­at­ing the pos­i­tive and neg­a­tive char­ac­ter­is­tics of Grund­fos brand pumps, despite the pres­ence of some short­com­ings, we can con­clude that they are a good com­bi­na­tion of func­tion­al­i­ty and prac­ti­cal­i­ty, they are easy to use and main­tain. Their main dis­ad­van­tage can be called a high­er cost com­pared to domes­tic coun­ter­parts. But they also last much longer.

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